A temperature control system of an electric vehicle, the electric vehicle comprising a compartment, a motor and a motor controller, and the temperature control system comprising: a circulation flow path comprising a first flow path, a second flow path, a third flow path, a fourth flow path and a high-temperature flow path, wherein cooling fluid is circulated in the circulation flow path; a liquid temperature adjustment device comprising a first inlet and a first outlet, wherein the liquid temperature adjustment device is disposed on the first flow path; a compartment heat exchanger comprising a second inlet and a second outlet for adjusting a compartment temperature of the compartment, wherein the second inlet is in communication with the first outlet through the first flow path; a heat-dissipation device comprising a third inlet and a third outlet, wherein the third inlet is in communication with the second outlet through the second flow path; a motor cooling circuit comprising a fourth inlet and a fourth outlet for adjusting the operating temperature of the motor and the motor controller, wherein the fourth inlet is in communication with the third outlet; and a flow path switch connected with the first inlet through the first flow path, connected with the second outlet through the third flow path, and connected with the fourth outlet through the fourth flow path, wherein the high-temperature flow path is disposed between and connected with the second flow path and the fourth flow path, so that the third inlet is in communication with the fourth outlet, and the first flow path is selectively changed to be in communication with the third flow path or the fourth flow path by the flow path switch. a circulation flow path comprising a first flow path, a second flow path, a third flow path, a fourth flow path and a high-temperature flow path, wherein cooling fluid is circulated in the circulation flow path; a liquid temperature adjustment device comprising a first inlet and a first outlet, wherein the liquid temperature adjustment device is disposed on the first flow path; a compartment heat exchanger comprising a second inlet and a second outlet for adjusting a compartment temperature of the compartment, wherein the second inlet is in communication with the first outlet through the first flow path; a heat-dissipation device comprising a third inlet and a third outlet, wherein the third inlet is in communication with the second outlet through the second flow path; a motor cooling circuit comprising a fourth inlet and a fourth outlet for adjusting the operating temperature of the motor and the motor controller, wherein the fourth inlet is in communication with the third outlet; and a flow path switch connected with the first inlet through the first flow path, connected with the second outlet through the third flow path, and connected with the fourth outlet through the fourth flow path, wherein the high-temperature flow path is disposed between and connected with the second flow path and the fourth flow path, so that the third inlet is in communication with the fourth outlet, and the first flow path is selectively changed to be in communication with the third flow path or the fourth flow path by the flow path switch.