关键词: 继承复杂性, 量度, 度量, 合成

Abstract: Extract the metrics which are relative to the measurement of oriented-object inheritance by analyzing object-oriented system and existed measurement method of object-oriented.By modifying and recombining these metrics，put forward class level inheritance complexity and system level complexity of inheritance.After modification and recombination，obtain several metrics that reflect the inheritance’s complexity：NIM（Number of Inherited Members），NOM（Number of Overriding Members），NRN（Number of Repeat Names of member），LIP（Length of Inheritance Path），and NMA（Number of Modified Access mode）.Therefore，we can find the measurement method of class level inheritance complexity and system level inheritance complexity by synthesizing these metrics.In the end，validate this method by comparing with other measurement methods.

Key words: complexity of inheritance, measurement, metric, synthesis