The invention discloses an electrostatic energy collector and an electrostatic energy collecting method. The electrostatic energy collector comprises a vibrating table (101), the vibrating table (101) is fixedly connected with a first end of a first transverse beam (102) and a first end of a second transverse beam (103), the first transverse beam (102) is parallel to the second transverse beam (103), vertical projections of the first transverse beam (102) and the second transverse beam (103) coincide, the first transverse beam (102) and the second transverse beam (103) are conductors, a first mass block (104) is fixed on the first transverse beam (102), one side of the second transverse beam (103), which is close to the first transverse beam (102), is coated with an electret layer (106), one side of the second transverse beam (103), which is far from the first transverse beam (102), is fixedly provided with a second mass block (105), a first guide wire (107) is connected with the first transverse beam (102) and a first end of a load (109), and a second guide wire (108) is connected with the second transverse beam (103) and a second end of the load (109). By means of the electrostatic energy collector and the electrostatic energy collecting method, the energy collecting efficiency can be increased.