This thesis including six chapters describes how to measure the fair value of unquoted equity instruments within the scope of IFRS9.Chapter 2 introduces the accounting standards and valuation guidelines used in this thesis. Chapter 3 describes the valuation principles associated with IFRS13 and IFRS9. Chapter 4 presents a range of commonly used valuation methods for measuring unquoted equity instruments.Chapter 5 discusses the valuation practices for measuring unquoted equity instruments in Taiwan and uses the actual data to analyze and understand the current market condition. This thesis focuses on the issues related to measuring unquoted equity instruments and establishes an overall structure for its decentralized concepts in order to help users realize and apply them.