A flood is one of the world's biggest issues. Millions of individuals are impacted by floods every year. In this work, a smart flood monitoring system architecture has been designed to keep track of the water level, weather, and rainfall. This system's primary objective is to transmit real-time flood information to the public and rescue teams. Two key components were suggested by this system architecture. A smart autonomous system makes up the second component, while weather and water level monitoring makes up the first. Information is gathered from the wireless sensors, which are dispersed over various areas, by weather and water level monitoring systems. The smart autonomous system uses satellite communication to gather data from the weather and water level monitoring unit and provides flood warning information to the public, the rescue team, and the alarm system. Space state analysis and time automata Petri nets are used to evaluate the architecture.