Drummers are the important role in a band, they control tempo and punch in the songs. However, the drum’s volume is too prodigious to carrying, result in drummers cannot record their idea preciously. In 2010, iPad brings a turning point to drummers idea recording, because iPad not only have good portability, but also get application easily. Therefore, if we can develop a idea recording application for drummers, the problem should be solved. This study through pre-research to generalize a design principle for drummer ideas recording application and use it to develop a iPad application- Dr. Helper - Rock Kit. After application development, this study verifi es the application’s usability by observation and questionnaire. Finally, Dr. Helper - Rock Kit’s concept and usability are both consistent with drummers requirement when they record their idea.