A sensing or generating method based on electrostatic induction caused by movement of a charged object (1; 11, 12 13), the method comprises using an induction based sensor or generator comprising - a first electrode layer and a second electrode layer cooperating therewith, the first electrode layer and the second electrode layer are separately disposed and electrically connected to each other by conductive wire or conductive film; - wherein the sensor or generator is configured such that an electric potential of the first electrode layer is generated by charges carried by the object (1; 11-13); and the potential is changed so that charges flow between the first electrode layer and the second electrode layer under the electrostatic induction effect and generate a current in said conductive wire or conductive film, when the object (1; 11-13) moves relative to the first electrode layer; - the sensor or generator further comprising ∘ a detection device connected to detect the current generated, or ∘ a load connected such that the current generated is supplied to the load; - the sensor or generator further comprises an isolating layer (6; 61), wherein the isolating layer (6; 61) is arranged to isolate the first electrode layer and the second electrode layer such that the first electrode layer and the second electrode layer are separated and are maintained in set relative positions; - the first electrode layer and the second electrode layer are both embedded in the isolating layer (6; 61), wherein ∘ the upper surface of the first electrode layer and the upper surface of the second electrode layer are exposed out of the upper side of the isolating layer; or ∘ the first electrode layer and the second electrode layer are entirely wrapped by the isolating layer and disposed proximate to the upper side of the isolating layer; the method comprising the steps of: - moving the object (1; 11-13) relative to the first electrode layer, so that a change of the electric potential of the first electrode layer is generated by charges carried by the object (1; 11-13); and - causing charges to flow between the first electrode layer and the second electrode layer so as to generate the current in said conductive wire or conductive film; and ∘ detecting the current in the detecting device; or ∘ supplying said current to said load. - a first electrode layer and a second electrode layer cooperating therewith, the first electrode layer and the second electrode layer are separately disposed and electrically connected to each other by conductive wire or conductive film; - wherein the sensor or generator is configured such that an electric potential of the first electrode layer is generated by charges carried by the object (1; 11-13); and the potential is changed so that charges flow between the first electrode layer and the second electrode layer under the electrostatic induction effect and generate a current in said conductive wire or conductive film, when the object (1; 11-13) moves relative to the first electrode layer; - the sensor or generator further comprising ∘ a detection device connected to detect the current generated, or ∘ a load connected such that the current generated is supplied to the load; ∘ a detection device connected to detect the current generated, or ∘ a load connected such that the current generated is supplied to the load; - the sensor or generator further comprises an isolating layer (6; 61), wherein the isolating layer (6; 61) is arranged to isolate the first electrode layer and the second electrode layer such that the first electrode layer and the second electrode layer are separated and are maintained in set relative positions; - the first electrode layer and the second electrode layer are both embedded in the isolating layer (6; 61), wherein ∘ the upper surface of the first electrode layer and the upper surface of the second electrode layer are exposed out of the upper side of the isolating layer; or ∘ the first electrode layer and the second electrode layer are entirely wrapped by the isolating layer and disposed proximate to the upper side of the isolating layer; ∘ the upper surface of the first electrode layer and the upper surface of the second electrode layer are exposed out of the upper side of the isolating layer; or ∘ the first electrode layer and the second electrode layer are entirely wrapped by the isolating layer and disposed proximate to the upper side of the isolating layer; - moving the object (1; 11-13) relative to the first electrode layer, so that a change of the electric potential of the first electrode layer is generated by charges carried by the object (1; 11-13); and - causing charges to flow between the first electrode layer and the second electrode layer so as to generate the current in said conductive wire or conductive film; and ∘ detecting the current in the detecting device; or ∘ supplying said current to said load. ∘ detecting the current in the detecting device; or ∘ supplying said current to said load.