diff --git a/backend/internal/service/prompt_agent.go b/backend/internal/service/prompt_agent.go
index f3e64ce..19a5270 100755
--- a/backend/internal/service/prompt_agent.go
+++ b/backend/internal/service/prompt_agent.go
@@ -26,7 +26,7 @@ func InitLLMConfig(cfg config.LLMConfig) {
 
 // PromptAgentInput 提示词优化 Agent 输入。
 type PromptAgentInput struct {
-	Tags      []string `json:"tags"`              // 用户选择的标签
+	Tags      []string `json:"tags"`               // 用户选择的标签
 	AssetType string   `json:"assetType"`          // 素材类型：sprite/background/ui/animation
 	Prompt    string   `json:"prompt,omitempty"`   // 用户原始提示词
 	UserNote  string   `json:"userNote,omitempty"` // 用户额外描述
@@ -89,7 +89,23 @@ func buildMetaPrompt(in PromptAgentInput) string {
 	sb.WriteString("输出要求：\n")
 	sb.WriteString("1. 三段式结构：【主题】描述画面主体与场景,【风格】描述艺术风格与视觉特征,【技术】描述分辨率、方向数等技术参数\n")
 	sb.WriteString("2. 使用专业术语，描述具体、可执行\n")
-	sb.WriteString("3. 风格一致，适合游戏资产管线\n\n")
+	sb.WriteString("3. 风格一致，适合游戏资产管线\n")
+	sb.WriteString("4. 根据用户标签和描述，识别素材布局模式，在【技术】段明确标注格式：\n")
+	switch in.AssetType {
+	case "sprite":
+		sb.WriteString("   - 单个精灵(默认)：独立PNG，纯白色背景(#FFFFFF)，描述为单个角色立绘/道具图标\n")
+		sb.WriteString("   - 精灵表(spritesheet)：角色/道具按行列等距网格排列，纯白色背景(#FFFFFF)，帧间固定间距(2-4px)，标注行列数，便于脚本一键拆分\n")
+	case "background":
+		sb.WriteString("   - 独立场景(默认)：单张完整背景图，层次分明\n")
+		sb.WriteString("   - 场景瓦片集(tileset)：地形/建筑元件按规则网格排列，纯白色背景(#FFFFFF)，元件间固定间距，标注行列数与瓦片尺寸，确保无缝拼接\n")
+	case "ui":
+		sb.WriteString("   - 独立UI元素(默认)：单个按钮/面板/图标，纯白色背景(#FFFFFF)，独立PNG\n")
+		sb.WriteString("   - UI瓦片集(tileset)：UI元件按规则网格排列，纯白色背景(#FFFFFF)，元件间固定间距，标注行列数，支持九宫格缩放，便于脚本一键拆分\n")
+	case "animation":
+		sb.WriteString("   - 帧序列(默认)：连续动画帧，独立帧文件或帧条带，纯白色背景(#FFFFFF)\n")
+		sb.WriteString("   - 动画精灵表(spritesheet)：动画帧按行列等距网格排列，纯白色背景(#FFFFFF)，帧间固定间距，标注行列数与方向数，便于脚本一键拆分\n")
+	}
+	sb.WriteString("\n\n")
 
 	tagStr := strings.Join(in.Tags, "、")
 	sb.WriteString(fmt.Sprintf("用户选择标签: %s\n", tagStr))
@@ -242,12 +258,13 @@ func parseStreamResponse(r io.Reader) (string, error) {
 // ======================== 模板回退 ========================
 
 func fallbackRefine(metaPrompt string) PromptAgentOutput {
-	tags, assetType := parseTagsFromMeta(metaPrompt)
-	prompt := generateStructuredPrompt(tags, assetType)
+	tags, assetType, userPrompt := parseTagsFromMeta(metaPrompt)
+	isSheet := isSheetRequest(tags, userPrompt)
+	prompt := generateStructuredPrompt(tags, assetType, isSheet)
 	return PromptAgentOutput{Prompt: prompt, RawText: prompt}
 }
 
-func parseTagsFromMeta(meta string) (tags []string, assetType string) {
+func parseTagsFromMeta(meta string) (tags []string, assetType string, userPrompt string) {
 	lines := strings.Split(meta, "\n")
 	for _, line := range lines {
 		if strings.HasPrefix(line, "用户选择标签:") {
@@ -262,34 +279,69 @@ func parseTagsFromMeta(meta string) (tags []string, assetType string) {
 		if strings.HasPrefix(line, "素材类型:") {
 			assetType = strings.TrimSpace(strings.TrimPrefix(line, "素材类型: "))
 		}
+		if strings.HasPrefix(line, "用户原始描述:") {
+			userPrompt = strings.TrimSpace(strings.TrimPrefix(line, "用户原始描述: "))
+		}
 	}
 	return
 }
 
-func generateStructuredPrompt(tags []string, assetType string) string {
+// isSheetRequest 从标签和提示词中识别是否为网格/瓦片集/精灵表模式。
+func isSheetRequest(tags []string, prompt string) bool {
+	keywords := []string{"精灵表", "spritesheet", "瓦片集", "tileset", "tilemap"}
+	for _, t := range tags {
+		tLower := strings.ToLower(t)
+		for _, kw := range keywords {
+			if strings.Contains(tLower, kw) {
+				return true
+			}
+		}
+	}
+	promptLower := strings.ToLower(prompt)
+	for _, kw := range keywords {
+		if strings.Contains(promptLower, kw) {
+			return true
+		}
+	}
+	return false
+}
+
+func generateStructuredPrompt(tags []string, assetType string, isSheet bool) string {
 	var sb strings.Builder
 	sb.WriteString("【主题】")
-	sb.WriteString(buildSubject(tags, assetType))
+	sb.WriteString(buildSubject(tags, assetType, isSheet))
 	sb.WriteString("\n")
 	sb.WriteString("【风格】")
 	sb.WriteString(buildStyle(tags))
 	sb.WriteString("\n")
 	sb.WriteString("【技术】")
-	sb.WriteString(buildTechNotes(assetType))
+	sb.WriteString(buildTechNotes(assetType, isSheet))
 	sb.WriteString("\n")
 	return sb.String()
 }
 
-func buildSubject(tags []string, assetType string) string {
+func buildSubject(tags []string, assetType string, isSheet bool) string {
 	tagStr := strings.Join(tags, "、")
 	switch assetType {
 	case "sprite":
+		if isSheet {
+			return fmt.Sprintf("一个融合%s元素的游戏角色精灵表，角色按行列等距网格排列，轮廓清晰，适合作为2D游戏角色", tagStr)
+		}
 		return fmt.Sprintf("一个融合%s元素的游戏角色精灵图，正面站立姿势，轮廓清晰，适合作为2D游戏角色", tagStr)
 	case "background":
+		if isSheet {
+			return fmt.Sprintf("一套%s风格的游戏场景瓦片集，地形/建筑元件按规则网格排列，适合2D游戏地图拼接", tagStr)
+		}
 		return fmt.Sprintf("一个%s风格的游戏场景背景，层次分明，包含前景、中景和远景", tagStr)
 	case "ui":
+		if isSheet {
+			return fmt.Sprintf("一套%s风格的UI瓦片集，UI元件按规则网格排列，适合脚本一键拆分", tagStr)
+		}
 		return fmt.Sprintf("一套%s风格的游戏UI元素，包括按钮、面板和图标", tagStr)
 	case "animation":
+		if isSheet {
+			return fmt.Sprintf("一个%s风格的角色动画精灵表，动画帧按行列等距网格排列，动作流畅连贯", tagStr)
+		}
 		return fmt.Sprintf("一个%s风格的角色动画帧序列，动作流畅连贯", tagStr)
 	default:
 		return fmt.Sprintf("一个%s风格的游戏素材，高质量，适合2D游戏使用", tagStr)
@@ -304,17 +356,29 @@ func buildStyle(tags []string) string {
 	return strings.Join(parts, "；")
 }
 
-func buildTechNotes(assetType string) string {
+func buildTechNotes(assetType string, isSheet bool) string {
 	switch assetType {
 	case "sprite":
-		return "输出格式: spritesheet；分辨率: 64x64 或 128x128；透明背景"
+		if isSheet {
+			return "输出格式: spritesheet；行列间隔完全相等、可脚本一键拆分对齐；纯白色背景(#FFFFFF，无渐变无噪点)；帧间固定间距(2-4px)；标注行列数"
+		}
+		return "输出格式: 独立PNG；纯白色背景(#FFFFFF)；尺寸: 按角色比例适配"
 	case "background":
+		if isSheet {
+			return "输出格式: 场景瓦片集(tileset)；规则网格排列；纯白色背景(#FFFFFF)；瓦片间固定间距；标注行列数与瓦片尺寸；确保无缝拼接"
+		}
 		return "输出格式: 独立PNG；分辨率: 1920x1080；层次分明的前中后景"
 	case "ui":
-		return "输出格式: 独立PNG素材；分辨率: 按元素适配；支持九宫格缩放"
+		if isSheet {
+			return "输出格式: UI瓦片集(tileset)；规则网格排列；纯白色背景(#FFFFFF)；元件间固定间距；标注行列数；支持九宫格缩放；可脚本一键拆分"
+		}
+		return "输出格式: 独立PNG素材；纯白色背景(#FFFFFF)；分辨率: 按元素适配；支持九宫格缩放"
 	case "animation":
-		return "输出格式: spritesheet或帧序列；建议4方向x4帧；透明背景"
+		if isSheet {
+			return "输出格式: 动画精灵表(spritesheet)；行列间隔相等；纯白色背景(#FFFFFF，无渐变无噪点)；帧间固定间距；标注行列数与方向数；可脚本一键拆分"
+		}
+		return "输出格式: 帧序列或帧条带；独立帧文件；纯白色背景(#FFFFFF)；建议4方向x4帧"
 	default:
-		return "输出格式: PNG；分辨率: 标准2D游戏分辨率"
+		return "输出格式: PNG；纯白色背景(#FFFFFF)；分辨率: 标准2D游戏分辨率"
 	}
 }
diff --git a/backend/internal/service/prompt_agent_test.go b/backend/internal/service/prompt_agent_test.go
index f805286..b0052c9 100755
--- a/backend/internal/service/prompt_agent_test.go
+++ b/backend/internal/service/prompt_agent_test.go
@@ -31,14 +31,30 @@ func TestRunPromptAgent_Fallback(t *testing.T) {
 
 func TestRunPromptAgent_Sprite(t *testing.T) {
 	output, err := RunPromptAgent(context.Background(), PromptAgentInput{
-		Tags:      []string{"像素", "中世纪", "战士"},
+		Tags:      []string{"像素", "中世纪", "战士", "精灵表"},
 		AssetType: "sprite",
 	})
 	if err != nil {
 		t.Fatalf("RunPromptAgent failed: %v", err)
 	}
 	if !strings.Contains(output.Prompt, "spritesheet") {
-		t.Errorf("sprite output should mention spritesheet: %s", output.Prompt)
+		t.Errorf("sprite sheet output should mention spritesheet: %s", output.Prompt)
+	}
+}
+
+func TestRunPromptAgent_SpriteSingle(t *testing.T) {
+	output, err := RunPromptAgent(context.Background(), PromptAgentInput{
+		Tags:      []string{"像素", "中世纪", "战士"},
+		AssetType: "sprite",
+	})
+	if err != nil {
+		t.Fatalf("RunPromptAgent failed: %v", err)
+	}
+	if !strings.Contains(output.Prompt, "纯白色背景") {
+		t.Errorf("single sprite output should mention 纯白色背景: %s", output.Prompt)
+	}
+	if strings.Contains(output.Prompt, "spritesheet") {
+		t.Errorf("single sprite output should not mention spritesheet: %s", output.Prompt)
 	}
 }
 
@@ -251,8 +267,9 @@ func TestBuildMetaPrompt_NoUserNote(t *testing.T) {
 
 func TestParseTagsFromMeta(t *testing.T) {
 	meta := `用户选择标签: 像素、中世纪、战士
-素材类型: sprite`
-	tags, assetType := parseTagsFromMeta(meta)
+素材类型: sprite
+用户原始描述: 一个持剑角色`
+	tags, assetType, userPrompt := parseTagsFromMeta(meta)
 	if len(tags) != 3 {
 		t.Fatalf("expected 3 tags, got %d: %v", len(tags), tags)
 	}
@@ -262,26 +279,29 @@ func TestParseTagsFromMeta(t *testing.T) {
 	if assetType != "sprite" {
 		t.Errorf("expected assetType=sprite, got %s", assetType)
 	}
+	if userPrompt != "一个持剑角色" {
+		t.Errorf("expected userPrompt='一个持剑角色', got %s", userPrompt)
+	}
 }
 
 func TestParseTagsFromMeta_SingleTag(t *testing.T) {
 	meta := `用户选择标签: 赛博朋克
 素材类型: background`
-	tags, _ := parseTagsFromMeta(meta)
+	tags, _, _ := parseTagsFromMeta(meta)
 	if len(tags) != 1 || tags[0] != "赛博朋克" {
 		t.Errorf("expected [赛博朋克], got %v", tags)
 	}
 }
 
 func TestParseTagsFromMeta_Empty(t *testing.T) {
-	tags, assetType := parseTagsFromMeta("no tags here")
+	tags, assetType, _ := parseTagsFromMeta("no tags here")
 	if len(tags) != 0 || assetType != "" {
 		t.Errorf("expected empty, got tags=%v assetType=%s", tags, assetType)
 	}
 }
 
 func TestGenerateStructuredPrompt(t *testing.T) {
-	prompt := generateStructuredPrompt([]string{"像素", "战士"}, "sprite")
+	prompt := generateStructuredPrompt([]string{"像素", "战士", "精灵表"}, "sprite", true)
 	if !strings.HasPrefix(prompt, "【主题】") {
 		t.Error("prompt should start with 【主题】")
 	}
@@ -293,21 +313,36 @@ func TestGenerateStructuredPrompt(t *testing.T) {
 	}
 }
 
+func TestGenerateStructuredPrompt_Single(t *testing.T) {
+	prompt := generateStructuredPrompt([]string{"像素", "战士"}, "sprite", false)
+	if !strings.Contains(prompt, "独立PNG") {
+		t.Errorf("single sprite should contain 独立PNG: %s", prompt)
+	}
+	if strings.Contains(prompt, "spritesheet") {
+		t.Errorf("single sprite should not contain spritesheet: %s", prompt)
+	}
+}
+
 func TestBuildSubject(t *testing.T) {
 	tags := []string{"像素", "战士"}
 	tests := []struct {
 		assetType, want string
+		isSheet         bool
 	}{
-		{"sprite", "精灵图"},
-		{"background", "场景背景"},
-		{"ui", "UI元素"},
-		{"animation", "动画帧序列"},
-		{"unknown", "游戏素材"},
+		{"sprite", "精灵图", false},
+		{"sprite", "精灵表", true},
+		{"background", "场景背景", false},
+		{"background", "瓦片集", true},
+		{"ui", "UI元素", false},
+		{"ui", "瓦片集", true},
+		{"animation", "动画帧序列", false},
+		{"animation", "精灵表", true},
+		{"unknown", "游戏素材", false},
 	}
 	for _, tt := range tests {
-		result := buildSubject(tags, tt.assetType)
+		result := buildSubject(tags, tt.assetType, tt.isSheet)
 		if !strings.Contains(result, tt.want) {
-			t.Errorf("buildSubject(%q) = %s, want containing %q", tt.assetType, result, tt.want)
+			t.Errorf("buildSubject(%q, isSheet=%v) = %s, want containing %q", tt.assetType, tt.isSheet, result, tt.want)
 		}
 	}
 }
@@ -327,17 +362,48 @@ func TestBuildStyle(t *testing.T) {
 func TestBuildTechNotes(t *testing.T) {
 	tests := []struct {
 		assetType, want string
+		isSheet         bool
 	}{
-		{"sprite", "spritesheet"},
-		{"background", "1920x1080"},
-		{"ui", "九宫格"},
-		{"animation", "4方向x4帧"},
-		{"unknown", "PNG"},
+		// 默认单人模式
+		{"sprite", "纯白色背景", false},
+		{"background", "1920x1080", false},
+		{"ui", "九宫格", false},
+		{"animation", "4方向x4帧", false},
+		{"unknown", "PNG", false},
+		// 瓦片集/精灵表模式
+		{"sprite", "spritesheet", true},
+		{"background", "tileset", true},
+		{"ui", "瓦片集", true},
+		{"animation", "spritesheet", true},
 	}
 	for _, tt := range tests {
-		result := buildTechNotes(tt.assetType)
+		result := buildTechNotes(tt.assetType, tt.isSheet)
 		if !strings.Contains(result, tt.want) {
-			t.Errorf("buildTechNotes(%q) = %s, want containing %q", tt.assetType, result, tt.want)
+			t.Errorf("buildTechNotes(%q, isSheet=%v) = %s, want containing %q", tt.assetType, tt.isSheet, result, tt.want)
+		}
+	}
+}
+
+func TestIsSheetRequest(t *testing.T) {
+	tests := []struct {
+		tags   []string
+		prompt string
+		want   bool
+	}{
+		{[]string{"像素", "精灵表"}, "", true},
+		{[]string{"像素", "spritesheet"}, "", true},
+		{[]string{"地形", "瓦片集"}, "", true},
+		{[]string{"UI", "tileset"}, "", true},
+		{[]string{"场景", "tilemap"}, "", true},
+		{[]string{"像素", "战士"}, "", false},
+		{[]string{"像素"}, "生成一个精灵表", true},
+		{[]string{"森林"}, "场景瓦片集", true},
+		{nil, "", false},
+	}
+	for _, tt := range tests {
+		got := isSheetRequest(tt.tags, tt.prompt)
+		if got != tt.want {
+			t.Errorf("isSheetRequest(tags=%v, prompt=%q) = %v, want %v", tt.tags, tt.prompt, got, tt.want)
 		}
 	}
 }