The servitude originated is an important system which is set up both on the civil law of the Civil law system and the property law of the Common-Law system. 地役權是大陸法系民法及英美法系財產法上均設立的一項重要制度，地役權制度能夠提高土地利用價值，最大限度地發揮土地的效能。
Mortgage, as a kind of security, which was originated from the ancient security system of Fiducia in Roman law, had acquired development and maturity in Common Law. 按揭這一擔保形式，源於羅馬法的古老的信託質擔保方式，發展並成熟於英美法系國家。
