The invention provides a multi-area interconnected microgrid system decentralized coordination scheduling method and device. The scheduling method comprises the following steps: S1, establishing MISOCP models of electro-pneumatic integrated energy systems of multiple areas; S2, obtaining an SOCP model according to the MISOCP model; s3, adopting an ADMM algorithm to initialize the SOCP model; s4, fixing the solved shared information value, and updating the value of the integer variable; s5, adopting a continuous cone optimization algorithm for each area, and autonomously solving an MISOCP modelof each area; S6, fixing the solved value of the integer variable of each area to obtain an updated SOCP model; s7, adopting an ADMM algorithm to carry out distributed optimization on the updated SOCP model; s8, judging the change condition of the integer variable, and if the integer variable does not change any more, returning the current area scheduling plan as a final scheduling result, otherwise, executing the step S9; and S9, increasing the number of iterations by 1, and repeatedly executing the steps S4-S8. According to the scheduling method disclosed by the invention, the information exchange amount between the areas can be reduced, and the convergence efficiency in the solving process is improved.