物权变动是物权的发生、变更和消灭的总称。从权利主体角度来看,则可称为物权的取得、变更和丧失。物权变动的原因,可以分为法律行为和法律行为以外的事实两类。法律行为是物权变动最常见的原因,包括双方行为,如买卖、互易等,以及单方行为,如抛弃等。法律行为以外的事实很多,如民法上的先占、添附、时效等,民法以外的公用征收、没收等。本文仅就法律行为引起的物权变动进行探究。 Real right change is the general term of the occurrence, change and elimination of real right. From the perspective of the rights of the main point, it can be called the acquisition, change and loss of property rights. The reasons for the change of real right can be divided into two kinds of facts besides legal acts and legal acts. Legal acts are the most common causes of real rights changes, including the conduct of both parties, such as trading, reciprocity, etc., as well as unilateral acts, such as abandonment. There are many facts besides legal acts, such as preemption, attachment and limitation in civil law, public collection except civil law, confiscation and so on. This article explores only the changes in real rights caused by legal acts.