1. A control apparatus configured to control operational conditions for executing functions of an image forming apparatus, comprising: an operational condition obtainment unit configured to read the operational conditions from the image forming apparatus; a display unit configured to display an operational condition setting screen for setting operational conditions corresponding to a function to be executed based on the operational conditions obtained by the operational condition obtainment unit, when executing the function; and a control unit configured to control the operational conditions to execute the function based on the operational conditions set on the operational condition setting screen; wherein on the operational condition setting screen, a user can select whether to take over the operational conditions obtained by the operational condition obtainment unit.