The invention provides a computer and a working method thereof. The computer system comprises a central processor and a memory, wherein the memory is provided with a resource distribution management storage region for storing an execution sequence when the central processor executes application programs; the memory is provided with a resource distribution management unit for dynamically changing the execution sequence according to the resource request quantity occupied by a plurality of application programs; and the execution sequence is as follows: the execution priority of the application program with small resource request quantity is higher than that with large resource request quantity. The method comprises the following steps: the resource distribution management unit receives resource request quantity information transmitted by the plurality of application programs, and writes the execution sequence of the plurality application programs into the resource distribution managementstorage region; the resource distribution management unit dynamically changes the execution sequence thereof according to the resource request quantity occupied by the application programs; and the central processor executes the application programs according to the execution sequence. The computer system and the method can improve the response speed of the application program with small resourcerequest quantity to avoid generation of system halted phenomenon.