System for monitoring a coastline environment, comprising at least one terrestrial sensing device and at least one marine sensing device, wherein said terrestrial sensing device comprises: a geophonic sensor adapted to be driven into a ground ashore or on land for detecting a first vibration propagating in said ground, a first electronic module configured for analyzing said first vibration and discriminating human activities in said monitored coastline environment which are associated with said first vibration, and further configured for generating a first alarm signal when human activities are detected, a first wireless communication module configured for transmitting said first alarm signal to remote locations; and wherein said marine sensing device comprises: a buoy configured for floating in an aquatic environment, a hydrophonic sensor supported by said buoy and configured for being immersed in said aquatic environment for detecting a second vibration propagating in said aquatic environment, a second electronic module configured for analyzing said second vibration and discriminating human activities in said monitored coastline environment which are associated with said second vibration, and further configured for generating a second alarm signal when human activities are detected; a second wireless communication module configured for transmitting said second alarm signal to remote locations; wherein said system for monitoring a coastline environment further comprises a control station, wherein said control station comprises: a third wireless communication module configured for receiving said first alarm signal and said second alarm signal, a third electronic module configured for processing identification information associated with said first alarm signal and said second alarm signal, an Internet connection module configured for transmitting said identification information to at least one web application for generating an alert. a geophonic sensor adapted to be driven into a ground ashore or on land for detecting a first vibration propagating in said ground, a first electronic module configured for analyzing said first vibration and discriminating human activities in said monitored coastline environment which are associated with said first vibration, and further configured for generating a first alarm signal when human activities are detected, a first wireless communication module configured for transmitting said first alarm signal to remote locations; and wherein said marine sensing device comprises: a buoy configured for floating in an aquatic environment, a hydrophonic sensor supported by said buoy and configured for being immersed in said aquatic environment for detecting a second vibration propagating in said aquatic environment, a second electronic module configured for analyzing said second vibration and discriminating human activities in said monitored coastline environment which are associated with said second vibration, and further configured for generating a second alarm signal when human activities are detected; a second wireless communication module configured for transmitting said second alarm signal to remote locations; wherein said system for monitoring a coastline environment further comprises a control station, wherein said control station comprises: a third wireless communication module configured for receiving said first alarm signal and said second alarm signal, a third electronic module configured for processing identification information associated with said first alarm signal and said second alarm signal, an Internet connection module configured for transmitting said identification information to at least one web application for generating an alert. a buoy configured for floating in an aquatic environment, a hydrophonic sensor supported by said buoy and configured for being immersed in said aquatic environment for detecting a second vibration propagating in said aquatic environment, a second electronic module configured for analyzing said second vibration and discriminating human activities in said monitored coastline environment which are associated with said second vibration, and further configured for generating a second alarm signal when human activities are detected; a second wireless communication module configured for transmitting said second alarm signal to remote locations; wherein said system for monitoring a coastline environment further comprises a control station, wherein said control station comprises: a third wireless communication module configured for receiving said first alarm signal and said second alarm signal, a third electronic module configured for processing identification information associated with said first alarm signal and said second alarm signal, an Internet connection module configured for transmitting said identification information to at least one web application for generating an alert. a third wireless communication module configured for receiving said first alarm signal and said second alarm signal, a third electronic module configured for processing identification information associated with said first alarm signal and said second alarm signal, an Internet connection module configured for transmitting said identification information to at least one web application for generating an alert.