Testing system for power supply

A testing system for testing a temperature of a power supply, the power supply having a voltage choice switch for switching the power supply to operate at a first voltage or a second voltage, the testing system comprising:

• a testing chamber for receiving the power supply therein, the testing chamber being configured for selectively providing a first or a second ambient temperature and supplying a testing environment for the power supply;
• a control switch for switching the power supply to operate between a standby state and an operational state;
• an electrical load electrically connected to the power supply, for functioning as a testing load for the power supply;
• an AC source electrically connected to the power supply, the AC source being configured for outputting the first voltage or the second voltage to the power supply;
• and
• a PLC configured for controlling switching states of the voltage choice switch and the control switch in a manner such that the power supply selectively operates in one of combined switching states of the voltage choice switch and the control switch.