A floating device includes a floating seat and a buoyancy adjusting unit. A first direction, a second direction and a third direction orthogonal to each other are defined. The floating seat includes a first plane and a second plane spaced apart in the first direction, two third planes spaced apart in the second direction, and two spaced apart in the third direction Four planes. The buoyancy adjusting unit includes four connecting seats respectively connected to the floating seat to make the floating device have a rectangular parallelepiped appearance. Each of the connectors has a first surface that is coplanar with the first plane, and an accommodating region that is recessed from the first surface. The buoyancy adjusting unit further includes four filler members respectively accommodated in the accommodating regions. The invention achieves the effect of adjusting the buoyancy by changing the overall load by designing each filler member to be removably accommodated in the respective accommodating regions. In addition, the present invention also provides a floating platform composed of a plurality of floating devices.一種漂浮裝置包含一個浮座，及一個浮力調整單元。定義相正交的一個第一方向、一個第二方向與一個第三方向。該浮座包括在該第一方向上相間隔的一個第一平面與一個第二平面、兩個在該第二方向上相間隔的第三平面，及兩個在該第三方向上相間隔的第四平面。該浮力調整單元包括四個分別與該浮座連接以使該漂浮裝置外觀呈長方體的連接座。每一個連接座具有一個與該第一平面共平面的第一表面，及一個自該第一表面朝下凹設的容置區。該浮力調整單元還包括四個分別容設於該等容置區的填充件。本發明藉由每一個填充件是可卸除地容設於各自的該容置區的設計，來改變整體荷重而達成調整浮力的功效。另外本發明也提供一種由多個漂浮裝置相組合而成的浮動平台。
