Abstract: Quantum precision measurement technology has shown broad application prospects in many fields due to its advantage of breaking through the standard quantum limit (SQL).The basic principles of quantum interferometry based on compressed and entangled light were introduced,mainly including the principles of Hong Ou Mandel (HOM) interferometry and Mach Zehnder (MZ) interferometry.This article summarizes the main application directions of quantum interferometry technology at present,including applications in the simultaneous measurement of small displacement and angle multiple parameters,gravitational wave measurement,gas concentration detection,and quantum imaging.It looks forward to the future development and application prospects of quantum precision measurement technology,and analyzes the current problems and future development trends.

Key words: Quantum interference, Precision measurement, Development trend