A wireless power transfer system including a plurality of power supply coils (11a, 1A to 1J) configured to perform wireless power transfer from the power supply coils to a plurality of power receivers (2, 2A to 2T), comprising: an entire controller (100, 110, 120) for controlling the wireless power transfer, in accordance with confirmed power transfer ranges of the plurality of power supply coils, wherein the entire controller (100, 110, 120) is configured to determine a power transfer group (PG11 to PG14) by stopping a transmission output of at least one power supply coil (1D, 1H) in the plurality of power supply coils, characterized in that: the entire controller (100, 110, 120) is configured to select the at least one power supply coil (1D, 1H), the transmission output of which is stopped, so as to control the number of the power supply coils included in the power transfer group (PG11 to PG14) not to exceed a first threshold value, or the entire controller (100, 110, 120) is configured to select the at least one power supply coil, the transmission output of which is stopped, so as to control the number of the power receivers included in the power transfer group not to exceed a second threshold value, or the entire controller (100, 110, 120) is configured to select the at least one power supply coil, the output of which is stopped, so as to control a total number of the power supply coils and the power receivers included in the power transfer group not to exceed a third threshold value. an entire controller (100, 110, 120) for controlling the wireless power transfer, in accordance with confirmed power transfer ranges of the plurality of power supply coils, wherein the entire controller (100, 110, 120) is configured to determine a power transfer group (PG11 to PG14) by stopping a transmission output of at least one power supply coil (1D, 1H) in the plurality of power supply coils, characterized in that: the entire controller (100, 110, 120) is configured to select the at least one power supply coil (1D, 1H), the transmission output of which is stopped, so as to control the number of the power supply coils included in the power transfer group (PG11 to PG14) not to exceed a first threshold value, or the entire controller (100, 110, 120) is configured to select the at least one power supply coil, the transmission output of which is stopped, so as to control the number of the power receivers included in the power transfer group not to exceed a second threshold value, or the entire controller (100, 110, 120) is configured to select the at least one power supply coil, the output of which is stopped, so as to control a total number of the power supply coils and the power receivers included in the power transfer group not to exceed a third threshold value. the entire controller (100, 110, 120) is configured to select the at least one power supply coil (1D, 1H), the transmission output of which is stopped, so as to control the number of the power supply coils included in the power transfer group (PG11 to PG14) not to exceed a first threshold value, or the entire controller (100, 110, 120) is configured to select the at least one power supply coil, the transmission output of which is stopped, so as to control the number of the power receivers included in the power transfer group not to exceed a second threshold value, or the entire controller (100, 110, 120) is configured to select the at least one power supply coil, the output of which is stopped, so as to control a total number of the power supply coils and the power receivers included in the power transfer group not to exceed a third threshold value.