A method for carrying out an automatic setting of network configuration of a portable communication device capable of accessing the Internet by wireless and having a network configuration database containing identifications (IDs) of Internet service providers (ISPs) and online basic data corresponding to the IDs, the method comprising the steps of reading the ID of the ISP in a subscriber identity module (SIM) card in the communication device; reading the online basic data from the network configuration database based on the ID; and setting a network configuration of the communication device. By utilizing this method, network configuration of the communication device can be set automatically by reading SIM card.