The invention provides an environmental-friendly vehicle-mounted concrete stirring system which comprises a removable vehicle body, a sealed chamber arranged on the vehicle body, and a concrete stirring system accommodated in the sealed chamber. The concrete stirring system comprises a concrete drier batching device, water and additive batching device and an ultrasound stirrer. Concrete drier, water and additives enter into the ultrasound stirrer after being batched and weighed by the concrete drier batching device and the water and additive batching device respectively. The invention further comprises a method using the environment friendly vehicle-mounted concrete stirring system for concrete stirring. The stirring system expands the business scope of a concrete mixing plant, adapts to conditions of most construction sites, avoids sewage, dust and noise pollution produced by traditionally stirring concrete on sites, enhances the thrashing effect to powder, and ensures that the concrete is uniformly stirred.