Abstract: For a radio telescope its sensitivity is an important parameter showing the capability of the telescope in detecting weak radio emission. In this paper we propose a measurement method of the sensitivities for the MUSER. Based on our analysis of measurements and subsequent calculations, the sensitivity parameter values of single antenna systems and the entire antenna array of the MUSER are obtained, so are the antenna efficiency values and system gain-factor values. The results can significantly support future scientific observation with the MUSER.