This creation is a kind of aquarium external hanging device for having filtering and refrigeration mould group, which has the function of filtering and refrigeration, and the attached extension what aquarium Hou side that can recline avoids generating visual interference to aquarium. The storage box of described device has the first, second accommodation chamber for being separated into upper and lower level, and a Water pump and a filter element are equipped in first accommodation chamber, and the second accommodation chamber is equipped with a frigorific unit, so that cultivation water filtering and cooling to aquarium is made. In addition a bait throwing in unit can be arranged in this creation in storage box, with modular extended function, the apical margin of the especially storage box, which extends forwardly into, forms a convex eaves above aquarium, the liftable transparent floating head wide with aquarium can be set up on the convex eaves, allow user that can reach purpose that is easy to clean, promoting cultivation enjoyment from top ornamental aquaria.本創作為一種具備過濾及致冷模組的水族箱外掛裝置，該裝置具有過濾及致冷的功能，並能夠貼靠附掛於水族箱後方避免對水族箱產生視覺上的干擾。所述裝置的容置箱具有分隔成上下層的第一、第二容置室，該第一容置室內設有一抽水泵浦及一過濾單元，第二容置室設有一致冷單元，俾能對使水族箱的養殖水過濾及降溫。本創作可另外在容置箱內設置一投餌單元，具有模組化的擴充功能，特別是該容置箱的頂緣向前延伸至水族箱上方形成一凸簷，該凸簷上可架設與水族箱等寬的可掀式透明浮蓋，讓使用者可從上方觀賞水族箱，達到容易清洗、增進養殖樂趣之目的。
