Microgrid provides an effective technical approach for distributed generator interconnection. The optimal operation of microgrid is an important research subject in the field. Electricity price is an important factor affecting economic benefits of microgrid system. In order to improve the economic efficiency of the microgrid further, an uncertain bilevel programming model is used to propose a joint optimal dispatching method of TOU & tiered pricing and microgrid considering the uncertainty of the system. Firstly, a load response model based on TOU & tiered pricing is established. Secondly, taking the TOU & tiered pricing as the upper level decision maker, with the maximum comprehensive benefit of the microgrid as the upper goal, while the optimized operation scheme of microgrid as the lower level decision maker, taking the lowest comprehensive operation cost as the lower target, the uncertain bilevel programming model in Maximin form is built with necessary constraints taken into account respectively. The integrated intelligent algorithm based on chaotic particle swarm optimization combined with uncertain function simulation is used to solve the proposed model. Finally, an example shows that the model is suitable for the optimized operation of micro grid under the TOU & tiered pricing mechanism, and its operating indexes are better than that under the original TOU power price. This work is supported by National Natural Science Foundation of China (No. 51337005).