The invention discloses a pet dog health detection device based on a dog toilet and a control method for the same and belongs to the technical field of pet hygienic products. The detection device comprises a toilet body and a detector, wherein the detector is connected to the toilet body; the toilet body comprises a basin bottom and a grid plate disposed in the basin bottom; a catheter used to collect pet dog urine is disposed under the grid plate; the catheter is connected to the detector; a controller and a color distinguishing device are disposed in the detector; the urine flows through the color distinguishing device; the color distinguishing device is connected to a controller; a display screen is disposed outside the detector; a switch is disposed at an opening of the catheter; the switch is connected to the controller; and the controller controls periodical opening and closing of the switch according to a calendar schedule. According to the invention, the detector is installed beside the dog toilet; the urine of a pet dog is collected periodically, and then image collection and comparison are conducted; disease situations of the pet dog can be judged preliminarily through analysis of the urine color, and the problem that diseases of the pet dog cannot be found in time can be solved; and the device has the advantages of a simple structure and early warning of the diseases of the pet dog.