Our paper has analyzed and compared cooperative R＆D and non-cooperative R＆D ons tandard-oriented technology. According to whether afirm coordinates R＆D investment and informatio nsharing, we have classified modes of innovation on standard-oriented technology into four types,which are complete R＆D competition, patentpool,pureR＆D cooperationand R＆D cooperation with patent pool.Based on the two classi cal models, we have developed a new model to discuss the performace of the above four modes.Some new finding sare:On theonehand, the mechanism of over coming the externaly of information sharing on the R＆D investment is partly different from that of the externality of R＆D investment; On the other hand, none of the four modes is superior to the other three. echnology spillover is only one of the key middle factors that de-terminate which mode is the best and it is dependent on the character of the industry.