Recently, as smartphone is becoming more and more popular, concern about security threats against Mobile Communication Device (MCD) is getting higher. The MCD can not only become the target of the cyber attacks, but also be used as the tool of the cyber attacks. This paper proposes a context-based remote security control scheme for MCD. The proposed scheme consists of two systems: Context-based Mobile Security (CMS) client and server. The proposed scheme can automatically not only protect the MCD from cyber attacks, but also prevent the MCD from being used as an attack tool, by help of CMS server. As an additional advantage, the proposed scheme can maximize performance of the MCD in terms of computing resource efficiency and user convenience because it automatically manages the security of the MCD.