The invention provides an aquatic animal disease diagnosis robot device capable of moving on the spot at will. A robot conducts operation and interaction easily and conveniently through voice, loudspeakers and a tough screen, and the acceptability is high; two mechanical arms of the robot achieve operations of monitoring or photographing through voice recognition; a computer system of the robot can conduct disease characteristic comparison, water quality and symptom relation model search and diagnosis case database reference comparison; and a retrieval analysis subsystem is started synchronously and is in butt joint with a powerful database of a cloud platform through networking to further conduct retrieval analysis. The aquatic animal disease diagnosis robot device is combined with the development tendency of modern fishery, is suitable for spot operation, achieves the powerful functions of platform databases and is convenient and efficient, diagnosis, analysis, result output and medication reference proposing are achieved at one step, time means economic benefits as for diagnosis and treatment of aquatic animals, the real benefits are brought to aquatic animal practitioners, and the technical prospects are wide.