An in vivo cancer treatment system includes a plurality of bio-medical units, a communication control device, and a wireless power source device. A bio-medical unit of the plurality of bio-medical units includes a power harvesting module operable to convert a wireless power source into a supply voltage； a communication module operable to communication data, wherein the communication unit is powered by the supply voltage； and a field generation module operable to generate a type of electromagnetic field, wherein the field generation module is powered by the supply voltage. The communication control device communicates with the plurality of bio-medical units to facilitate treatment of cancer cells within the body. The wireless power source device generates the wireless power source.
