Taiwan's active succession law is based on the principle of "personal property". That is, property belongs to some "person", and a "property succession" opens with his death; but still there is a conception of "family property" in Taiwanese daily life. This article is to deal with the forming and changing process of the conception. As the conclusion suggests, the conception of "family property" can be traced back to Ch'ing period, when there was a "family property system", under which the unit the property belongs to is "a family", governed by the elders and betters. There was no modem conception of "property succession", too. The family property was equally divided up according to the numbers of new-generation family. In 1895, Taiwan became Japan's colony, and, through Japanese law system, started indirectly to recept western (European) civil law. During this period, the traditional conception of "family property" was retained, but took on a different meaning. For example, under Japanese law system, the property can only belongs to a "person", so the "family property, "no longer means "the property belongs to a family", but "the property, belongs to a patriarch", and later a step closer to Japanese civil law, to a "house head". The modern "property succession system" was also introduced to Taiwanese for the first time. In 1945, the ROC government took the place of Japanese one as Taiwan's new ruler, and under whose law system, there is a principle of "personal property", and a "property succession system", too, but no such conception as "family property " This, however, doesn't mean the conception of "family property " is vanished from Taiwanese society forever, but rather, it only suggests that the conception is no longer a legal conception, but it still exists in Taiwanese daily life. And now, after reception of western civil law over a century in Taiwan, "family property" has been, in addition to its traditional understanding as "property belongs to a family", added some new senses as "father's personal property" or "patriarch's personal property".