Abstract: This paper at first introduces the new development of the experiment mechanics strain gauge measurement technique: Some new types special high temperature and cryogenic strain gauge, water-proof strain gauge, anti-magnet field strain gauge plastic strain gauge etc.; Some kinds of structure using force, displacement, load, acceleration etc. new types strain gauge transducers and new types high velocity statical data logger, small type multi-channels dynamical strain and temperature recorders, super-dynamical strain indicator and appropriate measureing technique. Then introduces some application examples: The thermal stress measurement of the power plant high temperature pipes with triplet under thermal state; The stress measurement of nuclear power plant structure elements under high temperature and pressure; The structure compleness test of nuclear reactor safe shell and the stress measuring plan of new nuclear reactor pressure shell and pipes for first period etc.