A synchronization control method, applied to a master device, comprising: a computing operation and a transmission operation; the computing operation comprises: setting a first reference time for a plurality of slave devices wirelessly connected to the master device; for each of the plurality of slave devices, determining a target count value K of a connection event and an offset time of a respective slave device; wherein an offset time of a slave device refers to a time difference between the first reference time and a start time of a Kth connection event of the slave device; or the computing operation comprises: selecting one of a plurality of slave devices, setting a target count value K of a connection event of a selected slave device, setting an offset time of the selected slave device as zero; wherein a start time of a Kth connection event of the selected slave device is taken as a second reference time; and for each unselected slave device in the plurality of slave devices, determining a target count value K of a connection event and an offset time of a respective unselected slave device; wherein an offset time of an unselected slave device refers to a time difference between the second reference time and a start time of a Kth connection event of the unselected slave device; the transmission operation comprises: for each of the plurality of slave devices, transmitting (103, 603) the target count value K of the connection event and the offset time to a respective slave device, so that the respective slave device performs control based on the target count value K of the connection event and the offset time, so as to perform a task at the first or second reference time. setting a first reference time for a plurality of slave devices wirelessly connected to the master device; for each of the plurality of slave devices, determining a target count value K of a connection event and an offset time of a respective slave device; wherein an offset time of a slave device refers to a time difference between the first reference time and a start time of a Kth connection event of the slave device; or the computing operation comprises: selecting one of a plurality of slave devices, setting a target count value K of a connection event of a selected slave device, setting an offset time of the selected slave device as zero; wherein a start time of a Kth connection event of the selected slave device is taken as a second reference time; and for each unselected slave device in the plurality of slave devices, determining a target count value K of a connection event and an offset time of a respective unselected slave device; wherein an offset time of an unselected slave device refers to a time difference between the second reference time and a start time of a Kth connection event of the unselected slave device; the transmission operation comprises: for each of the plurality of slave devices, transmitting (103, 603) the target count value K of the connection event and the offset time to a respective slave device, so that the respective slave device performs control based on the target count value K of the connection event and the offset time, so as to perform a task at the first or second reference time. selecting one of a plurality of slave devices, setting a target count value K of a connection event of a selected slave device, setting an offset time of the selected slave device as zero; wherein a start time of a Kth connection event of the selected slave device is taken as a second reference time; and for each unselected slave device in the plurality of slave devices, determining a target count value K of a connection event and an offset time of a respective unselected slave device; wherein an offset time of an unselected slave device refers to a time difference between the second reference time and a start time of a Kth connection event of the unselected slave device; the transmission operation comprises: for each of the plurality of slave devices, transmitting (103, 603) the target count value K of the connection event and the offset time to a respective slave device, so that the respective slave device performs control based on the target count value K of the connection event and the offset time, so as to perform a task at the first or second reference time. for each of the plurality of slave devices, transmitting (103, 603) the target count value K of the connection event and the offset time to a respective slave device, so that the respective slave device performs control based on the target count value K of the connection event and the offset time, so as to perform a task at the first or second reference time.