协调制度（Harmonized System，简称HS），即商品名称及编码的协调制度，是世界海关组织编制的关于国际贸易商品分类的标准目录，用以统一各国海关对商品分类的界定标准。通过按照协调制度进行商品归类，海关得以决定对于不同的商品征收相应的关税及采取相应的管理措施。现已有200多个国家或者经济联合体采用协调制度，其中133个参加了协调制度公约，覆盖了超过98%的国际贸易。协调制度除政府部门外，还被贸易业、物流业、商业等业界广泛使用，被称为“国际贸易的语言”。

协调制度的前身是海关合作理事会制定的《海关合作理事会商品分类目录》（CCCN）和联合国制定的《国际贸易标准分类》（SITC）。

The Harmonized Commodity Description and Coding System, also known as the Harmonized System (HS) of tariff nomenclature is an internationally standardized system of names and numbers to classify traded products. It came into effect in 1988 and has since been developed and maintained by the World Customs Organization (WCO) (formerly the Customs Co-operation Council), an independent intergovernmental organization based in Brussels, Belgium, with over 200 member countries.