Integrity is one of the most key factors of satellite navigation system. Moreover, satellite autonomous integrity is an important part of operational controlling and monitoring the global navigation satellite system(GNSS). This monitoring of the satellite autonomous integrity monitoring(SAIM) observations was concentrated on, including the specific monitoring methods and detection tests of pseudo-range, carrier phase, carrier-code coherence and multichannel code phase coherence. According to the civil aviation integrity regulations, the detection threshold and the minimum detectable abnormity were calculated, which provided some theoretical reference for terminal design of SAIM.