Micro gas meters have three functions of safely interdicting gas, including earthquake, over-time, and leakage interdiction, which can provide the households and gas-using safety. Japan officially promote micro gas meters’ installation and use since 1987 and have reach nearly 100% installation ratio from now on. There are no severe fire accident due from gas-leakage when the 1995 Osaka-Kobe Earthquake happened and when the 2011 off the Pacific coast of Tohoku Earthquake happened, which appeared that to install micro gas meters is very important. Consequently, since the end of 1999, Taiwanese micro gas meters’ promotion project go through four stages, which are key technology research and development, laws and decrees announces, project framing, and project submitted and authorized sequentially. We hope that we can reach the goal of overall installation nationally by this promotion project.