The term of extinctive prescription embodies the rational concessive limitation of rights to facts,and compromise limitation of state-should-be to practical state.Meanwhile,the confirmation for the beginning of the term for extinctive prescription influences the term of extinctive prescription,and links with the balances of interests among the obligee,the obligor and the third party,etc.To confirm the beginning of the term for extinctive prescription,we should mainly consider legislative goals of extinctive prescription,integrative balance for all kinds of benefits and the feasibility in lawsuits.The beginning of the term for extinctive prescription in China should be the moment when right of claim can be exercised practically.