A musical contents system comprises a contents providing server comprising a connecting unit that connects to a communication network, and a contents storage unit that stores musical contents in a storage area corresponding to a user of an electronic musical device; and an electronic musical device comprising a connecting unit that connects to the contents providing server via the communication network, an accessing unit that accesses to the contents storage unit via the communication network, and a contents operating unit that performs an operation to the musical contents stored in the contents storage area corresponding to the user. The musical contents purchased or created by the user can be stored in a data center; therefore, convenience of using the musical contents is improved and the cost is decreased or cut off.