Magnetron micro-nano robot refers to a micrometer or nano-scale artificial robot that uses an external magnetic field to control its movement direction and speed. It can achieve specific functions in or outside an organism, such as detection, imaging, delivery, diagnosis and treatment, etc. These robots can use the precise control and regulation of the magnetic field to achieve the accurate identification and treatment of tumors. These robots have the advantages of high efficiency, precision and safety, and can be used in a variety of applications in the field of anti-tumor therapy. Case study of anti-tumor therapy with magnetron micro-nano robot: Micro and nano robots based on ferrite nanoparticles (FNP) can realize magnetron movement and communication in live life. FNP is loaded on different shapes of silicon-based carriers to form different types of micro-nanorobots, such as disk, rod and spiral. These robots can control their motion direction and speed through an external magnetic field and communicate with other robots or external devices through FNP MR. These robots were used to achieve various functions in the body, including drug delivery, imaging and treatment in mice. Micro-nano robots based on metal-organic framework (MOF) can realize sound-controlled motion and intelligent response in living life. MOF molecules were loaded on a silicon-based carrier with hollow structure to form micro-nanorobots with porous properties. These robots can control their motion direction and speed through external ultrasound waves, and achieve an intelligent response to biomolecules through the adsorption properties of MOF molecules. These robots were used to perform drug delivery and treatment in mice. Micro-and nano robots based on DNA origami technology can realize light-controlled motion and intelligent response in the live body. Folold DNA molecules into micro-nanorobots with triangular frames and connect different types of functional molecules, such as fluorescent molecules, drug molecules, antibody molecules, at their vertices. These robots can control the direction and speed of their motion through external lasers and achieve intelligent responses with other robots or biological cells through base pairing of DNA molecules. These robots were used to achieve various imaging, diagnostic and therapeutic functions in mice.