Portable electronic device with guiding function

The invention provides a portable electronic device with guiding function, comprising a shell, a base band processing unit arranged in the shell, an accurate guiding unit which is arranged in the shell and is electrically connected with the base band processing unit as well as an instruction unit which is arranged outside of the shell and is electrically connected with the base band processing unit. The instruction unit is operated, so as to start the portable electronic device into guiding mode, the accurate guiding unit emits a detection signal to detect the information of obstacle in front and transmits the acquired detection result to the base band processing unit, and the base band processing unit acquires the type and distance information of the obstacle according to the detection result information.