The invention discloses a fluid controlling device for a bathroom. The fluid controlling device structurally comprises a fixed bottle, a connecting ring, a connecting pipeline, a shell, a flange No. 1, a fluid conveying pipeline and a flange No. 2, wherein the flange No. 1 and the flange No. 2 are mounted on the left side and the right side of the fluid conveying pipeline in a form of a left-rightstructure; the flange No. 1 and the flange No. 2 are mechanically connected with the shell; the connecting pipeline is mounted on the upper part of the shell and communicates with the shell; the other end of the connecting pipeline is mechanically connected with the connecting ring; the connecting ring is mounted at the bottom of the fixed bottle; the fixed bottle is placed inversely and is mechanically connected with the connecting pipeline through the connecting ring; and the fixed bottle communicates with the shell through the connecting pipeline. According to the fluid controlling devicedisclosed by the invention, under a common effect of a speed reduction device, a secondary accelerating device and a primary accelerating device, control of the flow velocity speed of fluid is realized, so that adjustment of the speed of the fluid is realized to meet a requirement of actual application.