A digital display device and a method for controlling the same are disclosed. The method of controlling a digital display device connected to at least one network and at least one memory includes receiving content (e.g., a TV program, etc.) over the at least one network, calculating memory capacity of an internal or external memory, storing the received content (e.g., a TV program, etc.) in the internal or external memory according to the calculated result, accessing the internal or external memory if a specific channel is selected, extracting the content (e.g., a TV program, etc.) stored in the accessed internal or external memory, and outputting video data and audio data corresponding to the extracted content (e.g., a TV program, etc.).