A front-end gateway unit is designed for integration to a remote ecological environment monitoring system that is equipped with a wireless sensor network (WSN) system installed at a remote site, such as a farmland or a garden, for the purpose of allowing the WSN system to exchange data with a back-end host server via a wireless communication system. The front-end gateway unit is characterized by the capability of using either the WSN system or a built-in sensing module for collecting ecological data, and the capability of combining geographical location data in the ecological data. This feature allows the collection of a comprehensive set of ecological data (including geographical location, temperature, humidity, sunlight data, wind speed, and pest number) for transfer to the back-end host server, such that research/management personnel at the local site can conveniently browse these ecological data and learn the ecological conditions of the remotely monitored area.