a system for controlling handover is disclosed that includes a mobile terminal that enables communications with multiple wireless systems having wireless access stations , and a handover - controlling apparatus that executes control of handover for the mobile terminal , which travels among multiple types of wireless systems . the mobile terminal includes a destination wireless system determining unit that receives downlink signals from the corresponding wireless access stations so as to determine which wireless system accommodates a destination wireless access station based on reception quality of downlink signals . the mobile terminal also includes a destination wireless system reporting unit that sends information indicating the determined wireless system to the handover - controlling apparatus . the handover - controlling apparatus includes a handover - controlling unit that controls handover operations for the mobile terminal based on the information indicating the determined wireless system , which is sent from the destination wireless system reporting unit .