The hearing procedure of rulemaking in America can be classified into 3 types, such as the most general procedure of notice and comment, the informal oral hearing taken place by the administrative agencies in the controversial situation when the written comments could not meet the requirements, and the formal hearing held by the agencies if statutes require strict formal hearing procedure. The hearing procedure requirement increases one by one and its applicable range decreases one by one in these three types of hearing procedures. The American experience is of important reference value to the hearing system construction in Chinese administrative legislation, China should clearly clarify the requirement of administrative legislation for the hearing system at legal level, distinguish different hearing systems to make them play their maximum role and implement the response mechanism for the hearing system.