 Highlights responsive photonic nanorobots, RPNRs, simultaneously exhibit energetic magnetically-propelled swarming motions, bright stimuli-responsive structural colors, and photothermal conversion. The swarming RPNRs can actively navigate in complex environments and collectively map out local physical-chemical conditions, pH, temperature, or glucose concentration, on the fly via their bright responsive structural colors. The swarming RPNRs can visualize an unknown target, tumor lesion, via modal targeting mapping and then guide the external anirlight to initiate localized photothermal treatment. This article was authored by Lu Linli, Xingyu, Zhenfeng Lu, and others.