A portable electronic apparatus for timely receiving and displaying electronic files is provided. An identification code of the electronic file indicates that the electronic file is an instant file or a common file. A receiving unit (21) of the portable electronic apparatus is configured for receiving the electronic file, determining according to the identification code whether the electronic file is an instant file and determining whether the main part is in the “power-on” state via help of a power controlling unit (24) of the portable electronic apparatus; and sending an interrupting instruction to the main part if the electronic file is an instant file and the main part is in the “power-on” state. The main part receives the interrupt instruction, and obtains the electronic file to display according to the interrupt instruction.