The current strawberry cultivation methods in China are generally traditional, and the picking, sorting, and harvesting of strawberries require a lot of manual labor. Therefore, designing a strawberry picking robot suitable for ridge cultivation has practical significance. The design needs were explored around the three aspects of user-machine- environment. A design method that integrated the FBS model and the TRIZ theory was proposed, and the ways to assist in structural optimization in the design process by digital simulation models were explored. A theoretical framework was constructed for the design method of strawberry picking robots, and digital content generation software was used to build scene models and robot models to assist in generating schemes. Trajectory simulation and dynamic simulation plugins were used to simulate the motion space of the robot's robotic arm, fruit gripping components, and driving mechanism, and the design scheme was preliminarily verified to be feasible. This framework can objectively obtain core product needs from multidimensional information. It can be incorporated into digital simulation tools to combine them with functional structure analysis and invention problem solving theory in the design process, so as to explore innovative design methods of agricultural robots.