The invention discloses a system protection experiment device and method based on multi-source information redundancy testing. According to the invention, the collection of system protection multi-source experiment data is ensured through communication connection between a multi-source information redundancy testing system and multiple experiment systems, the experiment data is cleaned according to redundancy characteristics of the experiment data, the reason of inconsistency of the experiment data is automatically analyzed, automatic analysis is performed on the system protection experiment data through reading relevant specifications of system protection operations and information, the operation logic, precision errors and information system of system protection are analyzed, and a testresult of system protection is automatically provided. Fast analysis and processing for the system protection experiment data is ensured, the system protection experiment efficiency is improved, the system protection experiment is guaranteed to be smoothly performed, and the safe and stable operation of large power grid is supported.