The Long Range (LoRa) technology was first developed by SemTech Company. LoRa is a wireless technology developed for long-range, low-power, low-bit rate and chirp spread spectrum (CSS) radio modulation technology, it also provides the ability to connect to sensors more than 15-30 miles away in rural areas.In this study, we present the LoRa system architecture with the functionality of each component and several typical application scenarios of LoRa network.LoRa is widely used into many applications, such as smart metering, factory monitoring and also it can be used to provide sensor information to communities to provide disaster alerts. LoRa networks allow for very long wireless links that can connect villages and towns. LoRa network is emerging as one of the most promising Low Power Wide Area networks (LPWAN).LPWANs represent a new trend in the evolution of the wireless communication designed to enable broad range of Internet of Things (IoT) applications.