A method of dynamically buffering content for providing a streaming service is provided. The method includes estimating a maximum amount of decrease in a network speed based on a result of measuring a network, and determining an amount of data to be buffered so that additional buffering, after playback of content is started, does not cause playback interruption, based on a maximum amount of decrease in the network speed, a total size of the content, a speed of playing the content, and a speed of receiving the content.