A capacitance detection apparatus, comprising: a sensing module, a connecting circuit, and a differential detection circuit configured to detect changes in capacitance of the sensing module; wherein the sensing module comprises: a substrate, and a first sensing layer and a second sensing layer respectively located on two sides of the substrate, a first sensing unit of the first sensing layer is opposite to a second sensing unit of the second sensing layer, the first sensing unit covers the second sensing unit, the substrate comprises a Printed Circuit Board or a Flexible Printed Circuit, the first sensing unit and the second sensing unit are copper foil patterns etched the Printed Circuit Board or the Flexible Printed Circuit, and a position of the first sensing unit on a first side of the Printed Circuit Board or the Flexible Printed Circuit is the same as a position of the second sensing unit on a second side of the Printed Circuit Board or the Flexible Printed Circuit such that, when a detection object approaches the first sensing layer, a capacitance to ground of the first sensing unit that comprises a base capacitance of the first sensing unit, a capacitance drift of the first sensing unit caused by a temperature change due to the proximity of the detection object, and a sensing capacitance caused by the detection object is generated, a capacitance to ground of the second sensing unit that comprises a base capacitance of the second sensing unit and a capacitance drift of the second sensing unit caused by the temperature change is generated, and the sensing capacitance caused by the detection object is determined based on a difference between the capacitance to ground of the first sensing unit and the capacitance to the ground of the second sensing unit; and the connecting circuit comprises a first branch and a second branch, and the first sensing unit is electrically connected to the differential detection circuit through the first branch, and the second sensing unit is electrically connected to the differential detection circuit through the second branch. the sensing module comprises: a substrate, and a first sensing layer and a second sensing layer respectively located on two sides of the substrate, a first sensing unit of the first sensing layer is opposite to a second sensing unit of the second sensing layer, the first sensing unit covers the second sensing unit, the substrate comprises a Printed Circuit Board or a Flexible Printed Circuit, the first sensing unit and the second sensing unit are copper foil patterns etched the Printed Circuit Board or the Flexible Printed Circuit, and a position of the first sensing unit on a first side of the Printed Circuit Board or the Flexible Printed Circuit is the same as a position of the second sensing unit on a second side of the Printed Circuit Board or the Flexible Printed Circuit such that, when a detection object approaches the first sensing layer, a capacitance to ground of the first sensing unit that comprises a base capacitance of the first sensing unit, a capacitance drift of the first sensing unit caused by a temperature change due to the proximity of the detection object, and a sensing capacitance caused by the detection object is generated, a capacitance to ground of the second sensing unit that comprises a base capacitance of the second sensing unit and a capacitance drift of the second sensing unit caused by the temperature change is generated, and the sensing capacitance caused by the detection object is determined based on a difference between the capacitance to ground of the first sensing unit and the capacitance to the ground of the second sensing unit; and the connecting circuit comprises a first branch and a second branch, and the first sensing unit is electrically connected to the differential detection circuit through the first branch, and the second sensing unit is electrically connected to the differential detection circuit through the second branch.