As one of analysis center of IGS MGEX, the precise post-processed orbit and clock products (indicated as WUM) have been provided by GNSS Research Center, Wuhan University since 2013. With improvement of the data procession strategy, in particularly the orbit modeling, the WUM products show good performance and consistency with other ACs’ products. To meet the huge demont of real-time applications, the real-time orbit and clock products of GPS, GLONASS, Galileo, and BeiDou satellites have been released since last year. In this research, the strategy used for determination of real-time orbit and clock will be presented, and some key algorithems and models will be addressed and highlighted. Moreover, the performance and stablibilty will be analyzed.