A capacitance detecting device (100,200,300), comprising: a charging module, configured to charge a base capacitor (130,230,330) between a detecting electrode and system ground; an integrating circuit comprising an amplifier (151,250,350) and an integrating capacitor (152,251,352), wherein the integrating capacitor (152,251,352) is connected in parallel with the amplifier(151,250,350), and the integrating circuit is configured to integrate, through the integrating capacitor(152,251,352), charges transferred from the base capacitor(130,230,330); a cancellation capacitor (120,220,320), configured to cancel a contribution of the base capacitor (130,230,330) to an output voltage of the amplifier (151,250,350); and a controlling module, configured to control the charging module to charge the base capacitor (130,230,330) in a first phase, control the charging module to stop charging the base capacitor (130,230,330) in a second phase, and control transfer of the charges on the base capacitor (130,230,330) to the integrating capacitor (251,352) in a third phase; wherein a charging voltage of the charging module, a capacitance of the integrating capacitor (152,251,352) and a capacitance of the cancellation capacitor (220,320) cause the contribution of the base capacitor (130,230,330) to the output voltage of the amplifier (151,250,350) to be zero; wherein the controlling module comprises a charging switch set, a discharging switch set and a clearing switch set, the charging switch set is connected to the charging module, one end of the discharging switch set is connected to the charging module, and the other end of the discharging switch set is connected to the integrating circuit; wherein the charging switch set is configured to control the charging module to charge the base capacitor (130,230,330) in the first phase, and stop charging the base capacitor (130,230,330) in the second phase and the third phase; the discharging switch set is configured to control the transfer of the charges on the base capacitor (130,230,330) to the integrating capacitor (152,251,352) in the third phase; and the clearing switch set is configured to control clear of charges on the integrating capacitor (152,251,352) in the first phase and the second phase; wherein the charging voltage of the charging module comprises a driving voltage (211,311) and a reference voltage (212,312); in the first phase, the driving voltage (211,311) and the reference voltage (212,312) charge the base capacitor (130,230,330) and the cancellation capacitor (120,220,320); and in the second phase and the third phase, the driving voltage (211,311) and the reference voltage (212,312) stop charging the base capacitor (130,230,330) and the cancellation capacitor (120,220,320). a charging module, configured to charge a base capacitor (130,230,330) between a detecting electrode and system ground; an integrating circuit comprising an amplifier (151,250,350) and an integrating capacitor (152,251,352), wherein the integrating capacitor (152,251,352) is connected in parallel with the amplifier(151,250,350), and the integrating circuit is configured to integrate, through the integrating capacitor(152,251,352), charges transferred from the base capacitor(130,230,330); a cancellation capacitor (120,220,320), configured to cancel a contribution of the base capacitor (130,230,330) to an output voltage of the amplifier (151,250,350); and a controlling module, configured to control the charging module to charge the base capacitor (130,230,330) in a first phase, control the charging module to stop charging the base capacitor (130,230,330) in a second phase, and control transfer of the charges on the base capacitor (130,230,330) to the integrating capacitor (251,352) in a third phase; wherein a charging voltage of the charging module, a capacitance of the integrating capacitor (152,251,352) and a capacitance of the cancellation capacitor (220,320) cause the contribution of the base capacitor (130,230,330) to the output voltage of the amplifier (151,250,350) to be zero; wherein the controlling module comprises a charging switch set, a discharging switch set and a clearing switch set, the charging switch set is connected to the charging module, one end of the discharging switch set is connected to the charging module, and the other end of the discharging switch set is connected to the integrating circuit; wherein the charging switch set is configured to control the charging module to charge the base capacitor (130,230,330) in the first phase, and stop charging the base capacitor (130,230,330) in the second phase and the third phase; the discharging switch set is configured to control the transfer of the charges on the base capacitor (130,230,330) to the integrating capacitor (152,251,352) in the third phase; and the clearing switch set is configured to control clear of charges on the integrating capacitor (152,251,352) in the first phase and the second phase; wherein the charging voltage of the charging module comprises a driving voltage (211,311) and a reference voltage (212,312); in the first phase, the driving voltage (211,311) and the reference voltage (212,312) charge the base capacitor (130,230,330) and the cancellation capacitor (120,220,320); and in the second phase and the third phase, the driving voltage (211,311) and the reference voltage (212,312) stop charging the base capacitor (130,230,330) and the cancellation capacitor (120,220,320).