Abstract: A multimedia play interface control device comprises a central processor, which controls actions of a memory card interface and an optical disc read/write interface. The central processor lets the memory card interface switch to a compatible interface for connecting a memory card having a different specification, and lets the optical disc read/write interface performs read/write actions to an optical disc. In other words, the single central processor is used to control read/write of memory cards and optical discs for integrating read/write of several kinds of storage media. The effect of multimedia play by a single device can thus be achieved. Moreover, the advantages of convenient use, small size and multiple selection can be accomplished.