In the 1950s, only 3% of the population gathered in the city, 2050 estimates that there will be 70% of the population living in the city, limited land load over population, in order to meet the needs of the United States, the United States, the United States, Enhance the quality of life of the people, all countries will be the city as the Internet of Things technology field, to build a variety of applications close to the needs of the people, and for their own urban governance problems, as well as urban vision of various solutions.

   As a pioneer in the wisdom of the city of Barcelona, more than a decade ago to promote the wisdom of infrastructure, and later in accordance with the "European 2020 Strategy" developed "MESSI strategy", through E government and information and communication technology to enhance people's quality of life. Barcelona in the early to "perceive Barcelona" as the call, in the city to build a large number of sensors and network equipment, and through the open platform, inviting the public to develop applications to accelerate the promotion of intelligent city applications.

   Barcelona, the use of wireless sensor technology to solve the problem of garbage removal efficiency, the local health authorities in all the trash to install the sensor, when the garbage will be informed of the cloud system, the central system will be in accordance with the return data, And with the garbage truck is currently GPS location, to help plan the most suitable route to improve the efficiency of garbage disposal, while the system records the amount of garbage data to help the future trash construction planning.