The invention discloses a solar driven robot dog. Intelligence and interactivity are added on the basis of the traditional toy, the monotonicity of the traditional toy is avoided, the interest of children can be more easily aroused, meanwhile, the cost reduction is also realized, light-weight materials are used for replacing traditional plastic or metal materials, certain softness is realized, the falling resistance performance is better, and inconvenience caused by too heavy weight is avoided. Four limbs adopt a mode of combining a four-foot type and a wheel type, so the solar driven robot dog has the flexibility of spanning across obstacles and also has fast moving capability. A four-foot type connected steering engine can do 180-degree rotation on two planes, and through the matching of different feet, the actions of advancing, retreating and leftward and rightward walking can be flexibly realized. A multi-sensor merging system is adopted, the advantages of low cost, high integrality, strong instruction and high speed are realized for carrying out merging processing on various kinds of information obtained by sensors and the like, the actions of owners in different intentions can be detected through one group of sensors according to different output analog signals, and the design is simplified, so the condition that the sensors are fully distributed on the whole body of a small dog due to excessive complication cannot occur. Meanwhile, the body form of the small pet is compressed as much as possible, so the solar driven robot dog is more pocket.