A substrate processing apparatus according to the present invention comprises a substrate holding mechanism for holding a substrate and rotating the held substrate; a process liquid supply mechanism for supplying a process liquid to the substrate; a process liquid acquisition section arranged so as to enclose the substrate holding mechanism and having an acquisition port for acquiring the process liquid scattered by the rotation of the substrate; a movement mechanism for changing a relative position between the process liquid acquisition section and the substrate held by the substrate holding mechanism; and a control mechanism for controlling, when the process liquid scattered by the rotation of the substrate is acquired in the acquisition port, a relative position between the substrate and the acquisition port such that the scattered process liquid is acquired in the acquisition port on the basis of predetermined substrate process condition.