The invention relates to a temperature test method, which comprises the following steps: deciding a plurality of temperature measuring positions on the surface of a shell on a portable electronic device; selecting two sets of test functions from a plurality of functions of the portable electronic device, wherein each set of test functions comprise at least partial functions; starting two sets of test functions of the portable electronic device during two test time intervals; measuring the temperature of the temperature measuring positions after starting each set of test functions and storing a measuring result into two sets of corresponding temperature values; judging whether two sets of the test functions is in accord with a preset condition or not according to two sets of temperature values; judging whether the two sets of the test functions have at least one same function or not if both the two sets of the test functions are in accord with the preset condition; and judging that at least one same function in the functions is abnormal if so.