diff --git a/config/config.example.json b/config/config.example.json
index a8400ad5f..ff2969dcb 100644
--- a/config/config.example.json
+++ b/config/config.example.json
@@ -130,6 +130,10 @@
       "encrypt_key": "",
       "verification_token": "",
       "allow_from": [],
+      "placeholder": {
+        "enabled": true,
+        "text": ["Thinking...", "Processing...", "Typing..."]
+      },
       "reasoning_channel_id": "",
       "random_reaction_emoji": [],
       "is_lark": false
@@ -161,7 +165,7 @@
       },
       "placeholder": {
         "enabled": true,
-        "text": "Thinking... 💭"
+        "text": ["Thinking...", "Processing...", "Typing..."]
       },
       "reasoning_channel_id": "",
       "crypto_database_path": "",
diff --git a/docs/channels/matrix/README.md b/docs/channels/matrix/README.md
index dd4b45eba..baded984e 100644
--- a/docs/channels/matrix/README.md
+++ b/docs/channels/matrix/README.md
@@ -22,7 +22,7 @@ Add this to `config.json`:
       },
       "placeholder": {
         "enabled": true,
-        "text": "Thinking..."
+        "text": ["Thinking...", "Processing...", "Typing..."]
       },
       "reasoning_channel_id": "",
       "message_format": "richtext",
@@ -45,12 +45,19 @@ Add this to `config.json`:
 | join_on_invite       | bool     | No       | Auto-join invited rooms |
 | allow_from           | []string | No       | User whitelist (Matrix user IDs) |
 | group_trigger        | object   | No       | Group trigger strategy (`mention_only` / `prefixes`) |
-| placeholder          | object   | No       | Placeholder message config |
+| placeholder          | object   | No       | Placeholder message config (see below) |
 | reasoning_channel_id | string   | No       | Target channel for reasoning output |
 | message_format       | string   | No       | Output format: `"richtext"` (default) renders markdown as HTML; `"plain"` sends plain text only |
 | crypto_database_path | string   | No       | Path to store the crypto database (uses workspace path `~/.picoclaw/workspace` if empty) |
 | crypto_passphrase    | string   | No       | Serialization key for encrypting session keys in the database; must remain unchanged once set |
 
+### Placeholder Config
+
+| Field   | Type           | Required | Description |
+|---------|----------------|----------|-------------|
+| enabled | bool           | No       | Enable placeholder messages (default: false) |
+| text    | string/[]string | No       | Placeholder text(s). Can be a single string or array of strings. If multiple texts are provided, one is randomly selected at runtime. Default: "Thinking..." |
+
 ## 3. Currently Supported
 
 - Text message send/receive with markdown rendering (bold, italic, headers, code blocks, etc.)
diff --git a/docs/channels/matrix/README.zh.md b/docs/channels/matrix/README.zh.md
index cd68a057e..81afa550b 100644
--- a/docs/channels/matrix/README.zh.md
+++ b/docs/channels/matrix/README.zh.md
@@ -22,7 +22,7 @@
       },
       "placeholder": {
         "enabled": true,
-        "text": "Thinking... 💭"
+        "text": ["Thinking...", "Processing...", "Typing..."]
       },
       "reasoning_channel_id": "",
       "message_format": "richtext",
@@ -51,6 +51,13 @@
 | crypto_database_path | string   | 否   | 加密数据库存储路径（为空时使用工作空间路径 `~/.picoclaw/workspace`） |
 | crypto_passphrase    | string   | 否   | 加密数据库中 session key 的序列化密钥；设置后不能更改 |
 
+### 占位消息配置 (Placeholder)
+
+| 字段    | 类型            | 必填 | 说明 |
+|---------|-----------------|------|------|
+| enabled | bool            | 否   | 是否启用占位消息（默认：false） |
+| text    | string/[]string | 否   | 占位文本。可以是单个字符串或字符串数组。如果提供多个文本，运行时会随机选择一个。默认："Thinking..." |
+
 ## 3. 当前支持
 
 - 文本消息收发
diff --git a/pkg/channels/discord/discord.go b/pkg/channels/discord/discord.go
index 3b5b4f8bb..2385544a6 100644
--- a/pkg/channels/discord/discord.go
+++ b/pkg/channels/discord/discord.go
@@ -254,10 +254,7 @@ func (c *DiscordChannel) SendPlaceholder(ctx context.Context, chatID string) (st
 		return "", nil
 	}
 
-	text := c.config.Placeholder.Text
-	if text == "" {
-		text = "Thinking... 💭"
-	}
+	text := c.config.Placeholder.GetRandomText()
 
 	msg, err := c.session.ChannelMessageSend(chatID, text)
 	if err != nil {
diff --git a/pkg/channels/feishu/feishu_64.go b/pkg/channels/feishu/feishu_64.go
index 0ab70649f..76df988ad 100644
--- a/pkg/channels/feishu/feishu_64.go
+++ b/pkg/channels/feishu/feishu_64.go
@@ -211,10 +211,7 @@ func (c *FeishuChannel) SendPlaceholder(ctx context.Context, chatID string) (str
 		return "", nil
 	}
 
-	text := c.config.Placeholder.Text
-	if text == "" {
-		text = "Thinking..."
-	}
+	text := c.config.Placeholder.GetRandomText()
 
 	cardContent, err := buildMarkdownCard(text)
 	if err != nil {
diff --git a/pkg/channels/matrix/matrix.go b/pkg/channels/matrix/matrix.go
index 50b86158d..f6370fa20 100644
--- a/pkg/channels/matrix/matrix.go
+++ b/pkg/channels/matrix/matrix.go
@@ -573,10 +573,7 @@ func (c *MatrixChannel) SendPlaceholder(ctx context.Context, chatID string) (str
 		return "", fmt.Errorf("matrix room ID is empty")
 	}
 
-	text := strings.TrimSpace(c.config.Placeholder.Text)
-	if text == "" {
-		text = "Thinking... 💭"
-	}
+	text := c.config.Placeholder.GetRandomText()
 
 	resp, err := c.client.SendMessageEvent(ctx, roomID, event.EventMessage, &event.MessageEventContent{
 		MsgType: event.MsgNotice,
diff --git a/pkg/channels/pico/pico.go b/pkg/channels/pico/pico.go
index f3ba55a92..1aa1941cf 100644
--- a/pkg/channels/pico/pico.go
+++ b/pkg/channels/pico/pico.go
@@ -275,10 +275,7 @@ func (c *PicoChannel) SendPlaceholder(ctx context.Context, chatID string) (strin
 		return "", nil
 	}
 
-	text := c.config.Placeholder.Text
-	if text == "" {
-		text = "Thinking... 💭"
-	}
+	text := c.config.Placeholder.GetRandomText()
 
 	msgID := uuid.New().String()
 	outMsg := newMessage(TypeMessageCreate, map[string]any{
diff --git a/pkg/channels/telegram/telegram.go b/pkg/channels/telegram/telegram.go
index e7da1d615..5adb40a7e 100644
--- a/pkg/channels/telegram/telegram.go
+++ b/pkg/channels/telegram/telegram.go
@@ -402,10 +402,7 @@ func (c *TelegramChannel) SendPlaceholder(ctx context.Context, chatID string) (s
 		return "", nil
 	}
 
-	text := phCfg.Text
-	if text == "" {
-		text = "Thinking... 💭"
-	}
+	text := phCfg.GetRandomText()
 
 	cid, threadID, err := parseTelegramChatID(chatID)
 	if err != nil {
diff --git a/pkg/config/config.go b/pkg/config/config.go
index fd7c48964..367952301 100644
--- a/pkg/config/config.go
+++ b/pkg/config/config.go
@@ -3,6 +3,7 @@ package config
 import (
 	"encoding/json"
 	"fmt"
+	"math/rand"
 	"os"
 	"path/filepath"
 	"strings"
@@ -382,8 +383,20 @@ type TypingConfig struct {
 
 // PlaceholderConfig controls placeholder message behavior (Phase 10).
 type PlaceholderConfig struct {
-	Enabled bool   `json:"enabled"`
-	Text    string `json:"text,omitempty"`
+	Enabled bool                `json:"enabled"`
+	Text    FlexibleStringSlice `json:"text,omitempty"`
+}
+
+// GetRandomText returns a random placeholder text, or default if none set.
+func (p *PlaceholderConfig) GetRandomText() string {
+	if len(p.Text) == 0 {
+		return "Thinking..."
+	}
+	if len(p.Text) == 1 {
+		return p.Text[0]
+	}
+	idx := rand.Intn(len(p.Text))
+	return p.Text[idx]
 }
 
 type StreamingConfig struct {
diff --git a/pkg/config/defaults.go b/pkg/config/defaults.go
index c56cd8596..44fc1f049 100644
--- a/pkg/config/defaults.go
+++ b/pkg/config/defaults.go
@@ -63,7 +63,7 @@ func DefaultConfig() *Config {
 				Typing:    TypingConfig{Enabled: true},
 				Placeholder: PlaceholderConfig{
 					Enabled: true,
-					Text:    "Thinking... 💭",
+					Text:    FlexibleStringSlice{"Thinking... 💭"},
 				},
 				Streaming:     StreamingConfig{Enabled: true, ThrottleSeconds: 3, MinGrowthChars: 200},
 				UseMarkdownV2: false,
@@ -112,7 +112,7 @@ func DefaultConfig() *Config {
 				},
 				Placeholder: PlaceholderConfig{
 					Enabled: true,
-					Text:    "Thinking... 💭",
+					Text:    FlexibleStringSlice{"Thinking... 💭"},
 				},
 				CryptoDatabasePath: "",
 				CryptoPassphrase:   "",