The invention discloses a testing method and system. The method includes the steps that M testing devices are connected with the input end of a testing access selection device, and N to-be-tested devices are connected with the output end of the testing access selection device, wherein M is larger than or equal to 1, and N is larger than or equal to 1; then the testing access selection device can select the corresponding testing devices from the M testing devices according to testing access control instructions so as to test the N to-be-tested devices, and in other words, the testing access selection device can be controlled according to the testing access control instructions to automatically select one or more testing devices to test the N to-be-tested devices. Thus, in the testing process, the N to-be-tested devices connected with the testing devices can be tested one or more times by conducting automatic switching through the testing access selection device according to the control instructions instead of manually switching the to-be-tested devices connected with the testing devices, and therefore the testing efficiency of the testing devices can be improved, and meanwhile the testing cost can be reduced.