1. A processing system for use in an electronic device, comprising: a memory unit configured for storing information of the electronic device; an application processor connected to the memory unit for handling applications of the electronic device, the application processor comprising: a temperature detector configured for detecting the temperature of the application processor; and a baseband processor connected to the memory unit, connected to the application processor by a universal asynchronous receiver/transmitter, and configured for providing communication capabilities for the electronic device; wherein when the sensed temperature of the application processor is higher than a predetermined temperature, the application processor directly sends a control command to the baseband processor via the universal asynchronous receiver/transmitter to direct the baseband processor to share workload of the application processor.