This paper made an objective analysis for energy state that the mankind faced now and pointed out that mankind have experiened three generational energies such as biomass (maily lumber), coal and petroleum, and that natural gas will be the optimum choice for human being's fouth generational energy. Besides conventional natural gas, unconventional natural gases will become more and more important members in human being's future energy constitution. Among the unconventional natural gases, abiogenic gas, deep oil and gas, gas hydrates and coalbed gas will be the most important research area and developing directions for future energy exploration and development. Based on the future energy choice and China's energy state analytical results, the authors raised some future energy developing suggestions for our country. These are: Recently, research on basical oil and gas geological theory for the northwest parts of China; Near future, research on natural gas, especialy on abiogenic gas and Future, preresearch on the moon's 3Heisotopic resource (raw material for nuclear fusion) development technique.