Provided is a method for designing a traveling case type solar bicycle based on TRIZ. Fourteen invention principles recommended in the TRRZ are taken as technological development routes for increasing useful functions, and a bicycle is developed into the traveling case type solar bicycle. The traveling case type solar bicycle comprises pedals, a chain, bearings, gears, wheels, handlebars, a brake, a saddle, a bicycle beam, a traveling case outer shell, four small wheels, a solar cell panel, a storage battery, lead wires, an electric motor, a transmission speed change mechanism and the like. The traveling case type solar bicycle is characterized in that the saddle, the handlebars, the bicycle beam, the wheels and other parts are connected in a flexible mode, the saddle, the handlebars and the wheels can be turned over and can be conveniently folded and overlapped in a sleeved mode, the soar cell panel is arranged on the outer portion of a traveling case, the solar bicycle generating power by means of the solar cell panel, a large amount of heat inside a traveling case is removed through the method of generating centrifugal force through the rotation of the rear wheel of the bicycle, and the cleanest solar energy resources in the world are used as power.