The developing rate of vehicles using one-time-only energy has slowed down.The fuel cells only contain the energy from hydrogen in the chemical elements,which will not produce CO-2,and therefore,it solves the glasshouse-effect problems.But there are three major problems for fuel cells: making hydrogen,storing hydrogen;low-temperature burning of hydrogen to let out the electric power.This paper expatiates on the category and principle of fuel cells,the differences between fuel cell equipped automobile and other electrical automobiles,and problems in the development of fuel cell driven automobile.