An apparatus for controlling running of multiple security software applications, including: a secure element and at least one central processing unit coupled to the secure element, where the secure element includes a processor and a first random access memory; the processor is configured to: run secure operating system software and at least one security software application based on the secure operating system software; when it is required to run a second security software application, suspend running of a first security software application in the at least one security software application, control migrating first temporary data generated during running of the first security software application from the first random access memory to a storage device disposed outside the secure element, and based on the secure operating system software, run the second security software application.