Business Entity Accounting Act Article 46

(Accumulated Depreciation)For remeasurement of depreciable assets, accumulated depreciation shall be established and presented as a deduction of the respective assets.Assets shall be depreciated on an annual basis.When depreciation of assets is computed, the salvage value shall be estimated. If the salvage value can be deducted according to the depreciation method, the balance after deduction of the salvage value shall be used as the basis for the computation.If an asset can continue to be used after expiration of its duration limit, it can continue to be depreciated using the salvage value thereof.
中文原文 商業會計法第46條
折舊性資產,應設置累計折舊項目,列為各該資產之減項。
資產之折舊,應逐年提列。
資產計算折舊時,應預估其殘值,其依折舊方法應先減除殘值者,以減除殘值後之餘額為計算基礎。
資產耐用年限屆滿,仍可繼續使用者,得就殘值繼續提列折舊。

English translation for reference only; the Chinese text prevails. Not legal advice.