Abstract: The present invention provides a flow-guiding device, comprising: a flow-guiding passage, a plurality of a first control valves, a flow-guiding bag and a flow-guiding tube. One end of the flow-guiding passage is connected to a flow-guiding opening and the other end of the flow-guiding passage is connected to a plurality of first control valves. The plurality of first control valves are further connected to the flow-guiding bag, which is connected to one end of the flow-guiding tube. By opening the plurality of first control valves, the fluid coming down from the flow-guiding opening is directed to flow into the flow-guiding bag, and by closing the plurality of first control valves. The other end of the flow-guiding tube is connected to a second control valve; by opening the second control valve, the fluid inside the flow-guiding bag is discharged. The present invention also provides an umbrella having a flow-guiding device.