A capsule endoscope includes a housing, a lens module, a light source, an imaging module, a memory, a radio frequency transmitter, a power source, and a chamber. The lens module is received in the housing. The light source is configured for illuminating an interior of a body. The imaging module is configured for capturing images of the interior of the body. The memory is configured for storing the captured images. The radio frequency transmitter is configured for wirelessly transmitting the stored images. The power source is electrically connected to the imaging module, the memory and the radio frequency transmitter. The chamber is received in the housing. The lens module and the housing are made of a biodegradable material, and the chamber, the light sources, the imaging module, the memory, the power source, and the radio frequency transmitter are made of a non-biodegradable material.