The significance of the studies on fluids from the earth inside is expounded on the basis of following several aspects:existence of fluids in the earth inside,estimation of total mass of fluids,fluid effects of the earth inside and present studying situation.This paper thinks that important studying areas for solid earth science in our country in near future will be to study the dynamic evolution of lithosphere with fluid effects as an critical member in the dynamic evolutional system of the earth, emphasize the fluids and their movements,solve the relationship between fluid effects and plate movements,and what is more,advance and establish the dynamic evolution model.This paer puts forward eight studying contents which should be paid attention to.