A method and an apparatus for evaluating quality of a software running environment of a device. The method includes: determining time deviation values of a to-be-evaluated device in all of N time periods; determining an inherent deviation value based on the time deviation values in all of the N time periods; determining, based on the time deviation values in all of the N time periods and the inherent deviation value, timing jitter amplitudes in all of the N time periods; and selecting a target timing jitter amplitude with a largest timing jitter amplitude. The evaluation parameter for measuring the quality of the software running environment of the to-be-evaluated device can be obtained, and the quality of the software running environment of the device can be evaluated by using the evaluation parameter.