Hot spot device having power control function and power control method

A hot spot device having a hot spot function, outputting an electromagnetic wave of a power when the hot spot function of the hot spot device is open, the hot spot device comprising:

• a communication unit;
• a processing unit coupled to the communication unit;
• a non-transitory storage medium coupled to the processing unit and configured to store a plurality of instructions, which causes the hot spot device to:
• detect whether the hot spot device communicates with a base station through the communication unit;
• acquire a first signal power of a first channel and a first noise power of the first channel when the hot spot device communicates with the base station, wherein the hot spot device communicates with the base station by the first channel;
• calculate a first signal-to-noise ratio between the first signal power and the first noise power;
• detect whether the hot spot device opens the hot spot function;
• acquire a second signal power of the first channel and a second noise power of the first channel when the hot spot device opens the hot spot function;
• calculate a second signal-to-noise ratio between the second signal power and the second noise power;
• determine whether the second signal-to-noise ratio is less than the first signal-to-noise ratio;
• calculate a difference between the first signal-to-noise ratio and the second signal-to-noise ratio when the second signal-to-noise ratio is not less than the first signal-to-noise ratio;
• compare the calculated difference with a preset reference value;
• and
• reduce the power of the electromagnetic wave to a target value when the calculated difference between the first signal-to-noise ratio and the second signal-to-noise ratio is more than the preset reference value.