The invention discloses an electric vehicle air-conditioning system using a capillary network radiation end. The electric vehicle air-conditioning system using a capillary network radiation end comprises a heat pump type refrigeration system, a battery box heat management system and a capillary network radiation end air-conditioning system, wherein the heat pump type refrigeration system comprises a heat pump type water chiller, a circulating water pump, a solenoid valve and the like; the battery box heat management system comprises a battery box, a first controller, a power battery pack, a microchannel cold plate and a temperature sensor; a temperature signal of the battery box is transmitted to the first controller, so that a control instruction is issued to a first solenoid valve and the heat pump type water chiller; the capillary network radiation end air-conditioning system comprises a second controller, a capillary network radiation end and a passenger compartment temperature sensor; and a temperature signal of a passenger compartment is transmitted to the second controller, so that a control instruction is issued to a second solenoid valve and an auxiliary electric heating system. According to the electric vehicle air-conditioning system using a capillary network radiation end disclosed by the invention, the same circulation loop is adopted, so that the heat management requirements of the battery box are met, and requirements for supplying cold for the passenger compartment in summer and supplying heat for the passenger compartment in winter are met.