Cooler box with temperature control function and temperature control method thereof

A cooler box with temperature control function, the cooler box comprises a cooler box body and a low-temperature media container installed outside the cooler box for storing liquid gas. The cooler box body is equipped with a controller, monitoring device and controllable valve, wherein the controllable valve is connected to the low-temperature media container through a pipe. The monitoring device is used to measure the temperature inside the refrigerator, and the controller is used to control the valve opening state of the controllable valve according to the measured temperature of the monitoring device and the duration of maintaining the opening state, so as to absorb the heat inside the refrigerator body by liquid gas vaporization to achieve the cooling effect. The invention also provides the temperature control method of the cooler box. The invention can make the temperature inside the cooler box to maintain within the appropriate temperature range.