Energy saving methods and apparatuses of a mobile terminal may be provided, For example, an energy saving method includes monitoring whether the mobile terminal loads a webpage data stream, determining webpage complexity of the webpage data stream, when the webpage data stream is loaded, determining one or more set parameter values, from among a plurality of parameter values of a set of regulation parameters, based on a correspondence relationship among the regulation parameters used for adjusting a frequency of a processor, setting one or more set regulation parameters based on the one or more set parameter values, adjusting the frequency of the processor based on the one or more set regulation parameters, and loading the webpage data stream at the adjusted frequency such that the mobile terminal completes loading of the webpage data stream in a set time range with reduced energy consumption may be provided.