The invention discloses a time delay performance obtaining method of IUB mouth, comprising : wireless network controller RNC sent descending transmission channel synchronization frame to the base station; the base station return ascending transmission channel synchronization frame to the said; according to the stated descending transmission channel synchronization frame and ascending transmission channel synchronization frame to obtain time delay value of IUB mouth; calculate one of the average delay,maximum delay,average time delay vibration and maximum time delay vibration or any combination by the time delay value of multi-IUB mouths obtained in statistical time. The invention also discloses time delay performance statistical device of IUB mouth. The invention can be used to overall and visualized calculate the time delay of IUB mouth, fully embodies the transmission quality of IUB mouth, provide reference data for maintenance, network optimization and make decisions for the implementation of IP transmission technology of IUB mouth for operators. |