Water spray bus station is a device that collects rainwater on rainy days and mitigates the heat island effect by spraying water mist to cooling.The design of rainwater collecting device is carried out by a modular way to combine triangles.The mezzanine is folded. By stretching the support bar, the effect of folding and unfolding is achieved. When it contracts, the device can collect rainwater, allowing the water to collect as quickly as possible. When the top spread, spray water mist to increase the spraying area. They will help lower city temperature and mitigate the heat island effect.