The invention belongs to the technical field of measuring device management, and relates to a measuring data validity verification system and method. The measuring data validity verification system comprises a data acquisition unit, a data validity verification unit and a data processing unit; the data acquisition unit is used for conducting acquisition and integrity checking on data information obtained through measuring of a measuring device, and the data validity verification unit is used for conducting decryption and integrity checking on the received data and conducting validity verification on the data passing checking; and the data processing unit is used for receiving the data and a data validity verification result which are transmitted by the data validity verification unit and marking and storing the data with different validities. The measuring data validity verification method comprises the steps of data acquisition, two times of data integrity checking, measuring device validity verification, measuring data validity marking and the like. According to the measuring data validity verification method, the integrity and validity of the measuring data are guaranteed, and the accuracy of the measuring data is improved.