A method for reducing booting time is to be implemented by an electronic device including first and second processing units, a cache memory, and a storage medium. The method includes the steps of: configuring the first processing unit for executing a set of program instructions for initializing hardware equipments of the electronic device; configuring the first processing unit for loading at least one library from the storage medium into the cache memory after initializing the hardware equipments of the electronic device, the at least one library being specified for use by the second processing unit; and configuring the second processing unit for booting a kernel of an operating system associated with the second processing unit after initializing the hardware equipments of the electronic device.