The Rongna Cu (Au) is a newly found large deposit, a typical high sulfidation epithermal deposit with typical mineral assemblages (alunite,enargite) and alteration. To find out the ore-forming fluid characteristics and make sure the ore genesis of this deposit,fluid inclusion from veined quartz are studied by petrography, microscopic temperature measurement and laser raman spectrum analysis research. The results show that fluid inclusions in these minerals can be classified into three types of liquid-rich inclusions, gas-rich inclusions and mineral-bearing three-phase inclusions. The homogenization temperatures and salinities of liquid-rich inclusions are range from 80 ℃ to 440℃, and 4.63% NaCl eqv to 11.95% NaCl eqv, and the homogenization temperatures and salinities of gas-rich inclusions are 320 ℃ to 440℃, 5.55% NaCl eqv to 10.74% NaCl eqv, and 200 ℃ to 400℃, 29.4% NaCl eqv to 32.56% NaCl eqv of mineral-bearing inclusions; The gas in gas-rich inclusions and liquid-rich inclusions are mainly composed of H2O with small amount of N2. Comprehensive analysis indicates that the metallogenic fluid of Rongna deposit occurred boiling and that is the important metallogenic mechanism. After all, the Rongna deposit is a high sulfidation epithermal deposit with assemblages and alteration features, but the main metallogenic stage characteristics of fluid inclusion in veined quartz are similar to the typical porphyry copper (gold) deposit. As a result, the deep of Rongna high sulfidation epithermal copper (gold) deposit possiblely exist porphyry copper gold mineralization and the ore deposit should belong to epithermal-porphyry copper (gold) deposit.