1. A task scheduling method for a heterogeneous multi-core processor system, the heterogeneous multi-core processor system including at least one first processor core each having first computing power and at least one second processor core each having second computing power lower than the first computing power, the task scheduling method comprising: referring to task priorities of tasks of the heterogeneous multi-core processor system to identify at least one first task of the tasks that belongs to a first priority task group, wherein each first task belonging to the first priority task group has a task priority not lower than task priorities of other tasks not belonging to the first priority task group; and dispatching at least one of the at least one first task to at least one run queue of at least one of the at least one first processor core.