An anti-sinking and anti-fire safety system for boats includes inflatable devices, is installed in a first deflated configuration and assumes a second irreversibly inflated configuration, with a volume considerably greater than the first deflated configuration. Each inflatable device is connected to at least one dispenser expanding a predetermined quantity of non-inflammable foam within the corresponding inflatable device to assume the desired volume in the second inflated configuration. Each dispenser is connected to an activator to activate the corresponding dispenser by remote control of the user, sent by a control system. The emergency system also includes dispensers, connected to the activator expanding non-inflammable foam between the free spaces present between the inflatable devices already inflated, and in any other fire risk space. The non-inflammable foam sublimates after a known time. The control system includes a processor and a communication interface.