1. An ophthalmic laser treatment apparatus comprising: an irradiation optical system including a treatment light source and a deflector for deflecting a laser beam for treatment emitted from the light source with respect to a patient's eye, the irradiation optical system being arranged to irradiate the laser beam to an area of the eye to be treated; a setting unit arranged to obtain two-dimensional analysis result data of a fundus of the patient's eye based on a three-dimensional tomographic image captured by an optical coherence tomography device before the laser beam is irradiated, and arranged to set information of an irradiation position of the laser beam in a surface direction of the fundus based on the obtained analysis result data; and a controller adapted to control operation of the light source and the deflector to irradiate the laser beam to the eye based on the irradiation position information set by the setting unit.