Public places surveillance system, suitable to signal, in the bud, situations of violence or emergency or even terrorism-related, consisting of at least one local device suitable to communicate through the internet network with at least one remotely positioned operations centre wherein at least one operator has access to a dedicated server connected to memory in which all emergency report events in encrypted form are saved; wherein said at least one local device comprises at least: - one fixed day/night video camera adapted to continuously record the environment subject of surveillance sending the data to at least one video analysis module integrated in said local device; - one thermographic camera adapted to continuously record the environment subject of surveillance sending the data to said video analysis module; - a motor-driven day/night video camera adapted to change orientation, upon command, of said video analysis module for precisely framing in the points where an emergency could occur; - a directional microphone adapted to detect the sound data from the environment subject of surveillance sending it to at least one semantic analysis module integrated in said local device; - a protection mask, suitable to frontally protect said local device; said mask being removable and being treated superficially so as to prevent seeing the video cameras from the external; - an events correlation module adapted to combine the processing operations carried out by said video analysis module and by said semantic analysis module to generate, according to a pre-established algorithm an alarm report to be sent to said operations centre; - a light signalling device suitable to light-up once said events correlation module detects a potentially dangerous situation and thus the video streaming of the images recorded by the video cameras and the audio streaming of the sounds detected by said directional microphone is sent to the operations centre and stored in the memory of the dedicated server in an encrypted version; - an audio speaker suitable to emit alarm acoustic signals should the operations centre confirm the existence of emergency requisites; said audio speaker also allowing vocal communication from the operations centre towards the environment subject of surveillance; - a power-supply system for connection to the power mains and an integrated rechargeable battery suitable to power-supply the local device even in case of electric power failure; - a system for connecting to the internet network through wire and/or through a Wi-fi router; said operations centre being suitable to view the images and sounds in streaming and assessing the actual occurrence of potentially dangerous situations, thus taking action, or filing the report as a false alarm. - one fixed day/night video camera adapted to continuously record the environment subject of surveillance sending the data to at least one video analysis module integrated in said local device; - one thermographic camera adapted to continuously record the environment subject of surveillance sending the data to said video analysis module; - a motor-driven day/night video camera adapted to change orientation, upon command, of said video analysis module for precisely framing in the points where an emergency could occur; - a directional microphone adapted to detect the sound data from the environment subject of surveillance sending it to at least one semantic analysis module integrated in said local device; - a protection mask, suitable to frontally protect said local device; said mask being removable and being treated superficially so as to prevent seeing the video cameras from the external; - an events correlation module adapted to combine the processing operations carried out by said video analysis module and by said semantic analysis module to generate, according to a pre-established algorithm an alarm report to be sent to said operations centre; - a light signalling device suitable to light-up once said events correlation module detects a potentially dangerous situation and thus the video streaming of the images recorded by the video cameras and the audio streaming of the sounds detected by said directional microphone is sent to the operations centre and stored in the memory of the dedicated server in an encrypted version; - an audio speaker suitable to emit alarm acoustic signals should the operations centre confirm the existence of emergency requisites; said audio speaker also allowing vocal communication from the operations centre towards the environment subject of surveillance; - a power-supply system for connection to the power mains and an integrated rechargeable battery suitable to power-supply the local device even in case of electric power failure; - a system for connecting to the internet network through wire and/or through a Wi-fi router;