Abstract: The present invention relates to a system, a method, and a computer-readable recording medium, which enable ordinary persons other than professional composers to easily compose music by using a music database provided by an online server. According to one aspect of the present invention, a composition system is provided, which comprises at least one database including a plurality of blocked musical elements and a composition server. The composition server includes a receiving portion for receiving a signal associated with a melody shape inputted from a terminal, a sound standardizing portion for analyzing tones and beats of a sound depicted by the melody shape and standardizing the sound, and a storage device for storing the sound standardized by the sound standardizing portion, wherein the standardized sound is capable of being transmitted, as at least one blocked musical element, to the terminal.