Abstract: The integrated hand dryer currently used on the market has several problems such as the users having a poor experience in drying the hand for a long time and the waste water being splashed back. An innovative design of the product is systematically executed based on TRIZ, identifying the interaction of system components based on functional analysis, and using casual method to sort through the casual logic chain and root cause of the problem. Focusing on the key problem, results to solving problems are analyzed and several solutions obtained by the tools of Cutting Rules, Physical contradiction, Separation Rule, Filed Rule, Standard Solution etc. Ultimately, these programs have been comprehensively optimized and evaluated based on the principle of continuous improvement of ideals.