A strict description of quantum mechanics on electron-ions bound state three-body system and two approximate solutions are given, which are (1) corresponding to pep bound state X rays with Ｅｐ≈１２．５keV monoenergy is emitted, (2) corresponding to D＋ｅD＋ bound state X rays with ＥＤ≈２５keV monoenergy is emitted, and also initiate a little (D,D)fusion to give out neutron, proton, triton l３He, l４He, and gamma ray. In this paper some experiments such as Ni-H, deuteriu gas glow discharge, are explained. The energy about the excess heat release is just a large quantity of X rays released in the two electron-ions bound state mentioned above, and only (D＋ｅＤ＋）can initiate nuclear fusion. The author further analyses a large number of the measured record solar flare energy sp