As the high-penetration intermittent microsource and the frequently-switched load may impact the opera-tion stability of islanded microgrids，a hierarchical coordinated control scheme based on different time scales，which takes into full consideration the control characteristics of both the diesel generator and the battery storage system，is proposed． In this scheme，a primary controller based on the battery storage system and a secondary controller based on the diesel generator are designed to improve the stability of voltage and frequency of islanded microgrids in diffe-rent time scales． Moreover，in order to resist smaller and faster random system net-load disturbances，a modified droop controller with P-f and Q-V controls of the battery storage system is proposed，which helps to improve the sta-bility of system voltage and frequency． At the same time，in order to resist bigger and slower system net-load dis-turbances，a PI controller and an auxiliary reactive power compensator are presented for the diesel generator，which helps to implement the isochronous control of system frequency and voltage and to further restore the system opera-tion stability． The feasibility and effectiveness of the proposed method is finally verified by the analysis of Dong’ao islanded wind-diesel-battery microgrid operated in various conditions．