In recent years, global climate anomalies (such as ENSO; global warming; and human damage), whenever heavy rains or typhoons, floods often make big disasters, not only cause loss of life and property, but also spend a lot of social costs. In general, most people use sandbags as a transient barrier, but need to spend a lot of manpower to do the transport. Bags may be due to exposure to cause brittle and hourglass, or unused for long time and solidified into a massive. “Goalkeeper” is a weir equipment design, replace sandbags often inconvenience, use water that everyone can filled it easily. In accordance with the width of the house door, it’s scalable to arrangement in “X” position, Forming an array of X-type has a strong water-blocking. After the floods receded, clean water from the tank and the squeegee shape of “Goalkeeper” can wash house silt easier, and do not waste too much more water.