The invention discloses an air-conditioner temperature control system, comprising an acquisition module and a control module, wherein the acquisition module is connected with the control module and is used for acquiring the ambient temperature in real time and sending the acquired temperature signal to the control module; and the control module is used for judging whether the ambient temperature is higher than the high temperature threshold or lower than the low temperature threshold according to the temperature signal, sending a switch-on command to an execution module when the ambient temperature is higher than the high temperature threshold to switch off the power supply of the air-conditioner and sending a switch-off command to the execution module when the ambient temperature is lower than the low temperature threshold to disconnect the power supply of the air-conditioner. The system has concise circuit structure, high measuring precision, strong antijamming capability, low power consumption and high cost performance, is convenient to expand, can automatically switch the power switch of the air-conditioner according to the indoor temperature, can take energy conservation and emission reduction into consideration so as to respond to low carbon life advocated by the nation and can prevent air-conditioning diseases.