The space-based gravitational wave detection mission needs to realize the construction of ultra-long distance (3×10⁶ km) laser link between two satellites through the laser acquisition and pointing system, and realize the capture precision of μ and the pointing jitter control of  at 1 mHz?1 Hz. The laser power becomes very small after being transmitted over millions of kilometers. Ultra-long distance, ultra-low power and high precision requirements make the laser link construction process of Taiji program a great challenge. In order to realize the networking of three satellites, the whole laser link construction process needs to establish three bidirectional laser links in turn. Space-based gravitational wave detection proposes a scheme to gradually build a bidirectional laser link by using three-level detectors of star tracker (STR), complementary metal oxide semiconductor (CMOS) capture camera and quadrant photodiode (QPD), and finally realize the ultra-stable laser pointing jitter control through the high-precision attitude information measured by the differential wavefront sensing (DWS) technology. At present, the scheme is in the stage of theoretical demonstration. In order to test the scheme, we adopt the laboratory’s laser acquisition and pointing integrated optical system and a card based on a ZYNQ chip, and expect to realize autonomous control of the whole laser link construction process.