With its advantages of safety, reliability, stability and accuracy, satellites are widely used in various fields.Based on the requirements of telemetering ground stations for high accuracy, coordination, real-time and networking of time, the paper introduces several typical time service technologies and conducts in-depth research on BeiDou satellite time service technology. Firstly, the composition of BeiDou time system and the advantages and disadvantages of single and two-way time service technical realization, theoretical derivation, error impact and accuracy evaluation of RDSS two-way time service are analyzed emphatically. Then, combined with the current situation and requirements of the telemetering ground station time service, the general idea of time unification in the telemetering ground station networking application is proposed. Through three-level control, unified traceability, internal and external interconnection, and point-to-point mode, a networked time service system of "BeiDou two-way time service as the main, NTP computer network time service as the auxiliary" is constructed. The network application scenario and network access strategy of telemetry ground station are analyzed and demonstrated. The research has strong practicality and feasibility, and can provide reference for networked time service application.