diff --git a/utils/geometry/floor_plan.go b/utils/geometry/floor_plan.go
new file mode 100644
index 0000000..758b9ad
--- /dev/null
+++ b/utils/geometry/floor_plan.go
@@ -0,0 +1,32 @@
+package geometry
+
+import (
+	"strings"
+)
+
+// FloorPlan 平面图
+type FloorPlan []string
+
+// IsFree 检查位置是否为空格
+func (slf FloorPlan) IsFree(point Point[int]) bool {
+	return slf.IsInBounds(point) && slf[point.GetY()][point.GetX()] == ' '
+}
+
+// IsInBounds 检查位置是否在边界内
+func (slf FloorPlan) IsInBounds(point Point[int]) bool {
+	return (0 <= point.GetX() && point.GetX() < len(slf[point.GetY()])) && (0 <= point.GetY() && point.GetY() < len(slf))
+}
+
+// Put 设置平面图特定位置的字符
+func (slf FloorPlan) Put(point Point[int], c rune) {
+	slf[point.GetY()] = slf[point.GetY()][:point.GetX()] + string(c) + slf[point.GetY()][point.GetX()+1:]
+}
+
+// String 获取平面图结果
+func (slf FloorPlan) String() string {
+	var result string
+	for _, row := range slf {
+		result += row + "\n"
+	}
+	return strings.TrimSuffix(result, "\n")
+}