Method and apparatus for determining length of sunshade eave of instrument seat

Embodiments of the invention disclose a method and an apparatus for determining the length of a sunshade eave of an instrument seat. The method comprises: obtaining a tilt angle of the instrument seat of a device; obtaining an angle of the height of the sun at noon in the local; obtaining a tilt angle of the sunshade eave of the device; and according to the tilt angle of the instrument seat, the angle of the height of the sun at noon and the tilt angle of the sunshade eave, calculating a shortest sunshade eave length through a sunshade eave calculation rule. According to the method and the apparatus, the length of the sunshade eave can be accurately determined only through the tilt angle of the instrument seat, the angle of the height of the sun at noon in the local and the tilt angle of the sunshade eave.