The invention belongs to the field of medical technology, and discloses a micro-robot capsule. The micro-robot capsule comprises a marking device, wherein the marking device comprises a fixing device (1), a piston (2), a spring (3), a nylon thread (4), a heater (5), a shielding device (6) and a label device (7). The micro-robot capsule provided by the invention can carry out mechanical movement, the labeling function is realized, specifically, when the micro-robot capsule arrives at a target site, a medical worker starts the marking device for releasing the label device, further, the disease screening and marking are realized at the specific target site, meanwhile, the medicine release at the target site also can be realized, and therefore, the diagnosis and treatment for diseases are facilitated.