High School Chemistry Compulsory 2 textbook of Shandong Science and Technology Press ?increased in hydrogen oxygen fuel cell，this proves that it is more important。Some improvement in hydrogen oxygen fuel cell showed indistinct chemical phenomenon，or added electronic component which complicated simple questions。I improved the experimental device of hydrogen oxygen fuel cell，so I find that it is simple and easy to operate? and it has Obvious phenomenon。Besides?these，I find it is promoted easily。