A method of controlling multiple calls of a communication device is provided. The method includes the steps below. Firstly, display P remote parties currently connected with the communication device, wherein the P remote parties form Q calls whose number and status determine a call menu including M options, where M is a positive integer. Next, select one of the remote parties, and select N options applicable to the selected remote party from the M options according to the selected remote party, wherein the N options are defined as N applicable options, where N is a positive integer. After that, display the N applicable options corresponding to the selected remote party. Following that, select one of N applicable options, and execute the selected applicable option corresponding to the selected remote party.