The invention discloses a remote interactive alarm system based on photovoltaic technology, and a network system. Data are acquired through agricultural data acquisition modules and are then transmitted to a data processor. Then an alarm signal is generated through determination and output. The remote interactive alarm system based on the photovoltaic technology according to the invention realizes a graded alarm function in manners of audible manner, visual manner, electrical manner, and particularly a simple and reliable short message transmission manner. A power supply system is composed of a solar power generating device, a storage battery energy storage device and an energy management circuit. A power supply for an acquiring device is ensured. Agricultural data are acquired through a plurality of kinds of physical quantity sensors and furthermore the agricultural data are transmitted through a wireless data chain. The graded alarm function is realized in a manner of loudspeaker, LED indicating lamp, LCD screen, etc. The remote interactive alarm system can operate singly and can also operate in a networked manner. The remote interactive alarm system is more suitable for combined operation with a data center.