The terminal device includes object lens, universal joints, motor drive and angular displacement sensor, part for switching channels, star capture channel and part, satellite laser communication channel and module, interfaces between each module and CPU, CPU, and interface between CPU and satellite platform. CPU controls switching part in adjustment channel so that light signal received by systemcan be transferred to star capture channel to capture stars, or to satellite laser communication channel, where relevant modules are cooperated to carry out satellite laser communication. Syncretizing function of star sensor, the system can accomplish capture procedure between communication terminal devices without need of scanning.