The present invention provides a method for writing data on a multilayer optical disc with N information storage layers (where N is an integer and N≧2). The kth deepest one (where k is an integer and 1≦k≦N) of the storage layers of the multilayer optical disc is called a kth information storage layer. The method includes the steps of: (A) finding the number of layers that an optical disc loaded into an optical disc drive has (disc type recognition); if the number of layers is X (which is an integer and X≧2), (B) tentatively writing data on a test write area of an mth information storage layer (where m is an integer and 1≦m≦X−1), thereby determining a provisional initial optical recording power (performing OPC); (C) choosing an appropriate correction coefficient according to the level of a target layer, on which data needs to be written, and correcting the provisional initial optical recording power based on the correction coefficient chosen, thereby determining an initial optical recording power; and (D) starting writing the data on the target layer with the initial optical recording power.