The invention provides a multi-color-temperature full-spectrum LED sun lamp illumination control system. The system comprises a solar cell panel, a solar voltage stabilizing circuit, a lithium battery, an environment detection module, a battery management chip, a mains supply circuit, a constant-current circuit, a control protection circuit, a power conversion circuit, a lithium battery power supply switching circuit, a control chip and a multi-color-temperature LED array. According to the invention, the commercial power and solar energy are combined for power supply; moreover, the whole powersupply stability is good, and the circuit structure is simpler compared with the prior art; on the other hand, illumination of a street lamp can be controlled according to changes of light and visibility of the environment, thereby guaranteeing that street lamp illumination can meet the environment change requirement, and road traffic and pedestrian safety is guaranteed.