Portable endoscope with good heat dissipation performance

The invention discloses a portable endoscope with a good heat dissipation performance. The portable endoscope comprises a host, a plurality of circuit control panels arranged in the host, and a fan for cooling the circuit control panels. The fan is connected to a motor. Each circuit control panel comprises a fan control circuit board, which is provided with a temperature detection circuit for monitoring the temperature of the circuit control panel and a control circuit that controls the rotation speed of the motor according to a signal from the temperature detection circuit. The lateral surface of each circuit control panel is provided with an exhaust duct that is used to exhaust hot air from the host; and the exhaust duct is connected to an air extractor. The temperature sensors are usedto monitor the temperature of the circuit control panels; the rotation speed of the fan is adjusted according to the temperature; when the temperature is low, the electricity consumption is reduced, when the temperature is hi