The present invention discloses a wind turbine generator as well as a parameter acquisition system and a method thereof. The acquiring system comprises: at least one sensor, arranged in the hub of the wind turbine generator and configured to acquire environment operation parameters of the hub, and a data processing module, comprising a parameter acquisition unit, a parameter reading unit and a storage unit, wherein the parameter acquisition unit is connected with each sensor and configured to obtain environment operation parameters acquired by the each sensor; the parameter reading unit is connected with pitch drivers in the wind turbine generator and configured to read load characteristic parameters of the pitch drivers; the storage unit is connected with the parameter acquisition unit and the parameter reading unit and configured to store the environment operation parameters and load characteristic parameters.