Abstract: An investigation for the flare on July 14, 1980, is presented by using the Hα patrol observational data in A. R. obtained at Yunnan Observatory and X-ray data from SMM. Our comprehensive analyses for the flare contain the following items: determining its position at Ha; making a positional comparison at Hα and X-ray wavelengths; getting the energy spectra of X-ray bursts; determining the change of spectral index with time; calculating the total number of accelerating high energy electrons during its eruption and approaching the radiative mechanism of soft and hard X-ray bursts. The results show that: (17 the hard X-ray burst is produced by high energy non-thermal electrons accelerated in the current sheet; (2) the soft X-ray burst is produced by hot bremss-trahlung rediation of high-temperature plasma in the flare at first, then hot bremss-trahlung radiation is gradually replaced by bremsstrahlung one of non-thermal electrons; (3) when the comparison of positions between Hα and X-ray images is used to estimate the. altitude of the X-ray burst source, the flare model and the configuration of magnetic field must be considered. They all support Emerging Magnetic Flux mo-del^[8] (EMFmodel) of flare process.