Abstract: Considering the increase of heat load from electronic equipment on unmanned aerial vehicle (UAV), a cooling scheme based on skin heat exchanger is proposed. Temperature of key components and efficiency of the skin heat exchanger are determined according to design requirements. Furthermore, test verification is carried out. The scheme belongs to liquid cooling, and the heat load from electronic equipment can be dissipated to the heat sink of ram air through skin heat exchanger. The ground experiment based on equivalent heat transfer measurement tests the temperatures of various parts of the running system. In addition, heat transfer of the heat exchanger and COP of the system are calculated. Results indicate that the scheme is feasible and effective, which means it can meet the cooling demand of electronic equipment with high power on UAV and has wide application value.