The present invention relates to method and system of preventing accidents occurring due to accidental or unintentional falls from building using a saviour bag. The present invention relies on various steps to detect and prevent accidents by taking appropriate actions. The steps include a) placing sensors on each floor of a building depending on height and width of each floor b) activating and deactivating the sensors on the basis of the position of the person c) activating the buzzer based on the activation and deactivation of the sensors d) detecting that a person has jumped e) deploying a saviour bag for saving the life. Whenever a person stands with the support of the sidewall, few sensors get activated. Whenever a person climbs on the wall, the contact with some sensors will deactivate and with others get activated. At this time, the buzzer is activated to alert the respective authorities. As soon as the person jumps, the sensor on the topmost floor will detect that the person has jumped and will initiate the deployment process. The saviour bag will be deployed to save that person and life will be saved.