A mobile announcement system distributed on one or more servers operably coupled to one or more client computing devices and one or more service provider computing devices and one or more mobile announcement devices by a public network which supports a mobile announcement program accessible by browser based on-line processing or downloadable by the client computing devices or the service provider computing devices to establish on-line or off-line wired or wireless connection with one or more mobile announcement devices which operate based on pre-selected announcement conditions to make visual or audio announcements.