A method of power management of a computer device includes a number of steps. When a decision element determines that the computer device must enter a power saving mode, the decision element generates a power saving mode signal. When an embedded controller detects the power saving mode signal, the embedded controller determines whether an NFC transceiving module is sending or receiving information. If the NFC transceiving module is sending or receiving information, the embedded controller postpones entering into the power saving mode by the computer device until the NFC transceiving module finishes sending or receiving information.