The utility model relates to a detecting device with function of independently cooling down, including the detecting device body, the detecting device body is including shell and upper cover, shell and upper cover in the distolateral swing joint in back, and the video acquisition unit who is equipped with the main control board in the shell and is connected with the main control board, heat abstractor is installed to the rear end of detecting device body, and heat abstractor includes the thermoelectric refrigeration piece that is connected through power supply loop with DC power supply, locates the cold junction thermal module in the shell and locate the outer hot junction thermal module of shell, cold junction thermal module, hot junction thermal module contact with two sides of thermoelectric refrigeration piece respectively, the power supply loop of thermoelectric refrigeration piece connects temperature detect switch, be equipped with temperature sensor in the shell, be connected with temperature detect switch. The utility model discloses an install heat abstractor in detecting device body rear end, solved detecting device unable normal technical problem under high temperature.