The invention provides a system and method for testing antijamming capability of wireless communication products operating at ISM (Industry, Science and Medical) frequency range, which relates to the method and the method for testing antijamming capability of wireless communication products and solves the problem that the antijamming capability of wireless communication products operating at ISM frequency range can not be tested. The system works as follows: signals transmitted by a transmitter are input into a receiver after passing through a first adjustable attenuator and a first combiner;signals transmitted by a signal source are input into the receiver after passing through a second adjustable attenuator and a second combiner. The method comprises the steps of: simulating signals ofcommon radio communication systems near and in communication product working frequency bands through a signal source; and observing error code conditions of a receiver to be tested by adopting receiver error coder characteristic testing equipment to obtain a desired signal power and an interference signal power of each system and further realize quantitative analysis on the antijamming capabilityof the wireless communication products operating at ISM frequency range. The invention is applicable to testing the antijamming capability of the wireless communication products operating at ISM frequency range.