TRIZ DOCTOR is a mobile application for learning TRIZ. TRIZ is undoubtedly one of the most popular methodologies for systematic problem solving. Therefore many universities and other educational institutions are now offering TRIZ classes for the purpose of enhancing creativity and problem solving skill. However, it is not easy to expect trainees to apply TRIZ for their own real problems beyond the level of learning something. Large amount of materials and less accessibility of data lead to this situation. In order to provide TRIZ tools handy, we have developed a mobile application named as TRIZ DOCTOR. The application includes TRIZ basic tools such as 40 inventive principles, separation principles and contradiction matrix. It enables trainees to learn TRIZ interactively and to use TRIZ tools even after the class anywhere anytime.