A power mode management system comprising: a server, configured to store at least one available profile, the available profile being correlated with a target application program and a target hardware combination and configured to store a target power mode parameter combination of the target hardware combination; and a client host, including a current hardware combination, wherein the client host is configured to load and execute a current application program and to load and execute a power mode setting program segment, so as to load the available profile from the server when the current application program complies with the target application program and the current hardware combination complies with the target hardware combination, and to update a current power mode parameter combination of the current hardware combination into the target power mode parameter combination; wherein the power mode management system is characterized in that: the client host is configured to generate an available profile request and to transmit the available profile request to the server; the client host is configured to correlate the current application program, the current hardware combination and the current power mode parameter combination to generate a current profile when the current application program and the current hardware combination do not simultaneously comply with the target application program and the target hardware combination, and to transmit the current profile to the server as one of a plurality of candidate profiles; and the server is configured to select one of the candidate profiles as another available profile. a server, configured to store at least one available profile, the available profile being correlated with a target application program and a target hardware combination and configured to store a target power mode parameter combination of the target hardware combination; and a client host, including a current hardware combination, wherein the client host is configured to load and execute a current application program and to load and execute a power mode setting program segment, so as to load the available profile from the server when the current application program complies with the target application program and the current hardware combination complies with the target hardware combination, and to update a current power mode parameter combination of the current hardware combination into the target power mode parameter combination; wherein the power mode management system is characterized in that: the client host is configured to generate an available profile request and to transmit the available profile request to the server; the client host is configured to correlate the current application program, the current hardware combination and the current power mode parameter combination to generate a current profile when the current application program and the current hardware combination do not simultaneously comply with the target application program and the target hardware combination, and to transmit the current profile to the server as one of a plurality of candidate profiles; and the server is configured to select one of the candidate profiles as another available profile. the client host is configured to generate an available profile request and to transmit the available profile request to the server; the client host is configured to correlate the current application program, the current hardware combination and the current power mode parameter combination to generate a current profile when the current application program and the current hardware combination do not simultaneously comply with the target application program and the target hardware combination, and to transmit the current profile to the server as one of a plurality of candidate profiles; and the server is configured to select one of the candidate profiles as another available profile.