Abstract: The world is on a constant momentum of development, creating new opportunities, but at the same time, there are many challenges presented. One of the most serious challenges that people need to face is climate change. Agriculture is the sectors most affected by climate change. Climate-Smart Agriculture will achieve its goals of food security, minimizing climate change effects. For Vietnam, the application of agriculture 4.0 is the application of the achievements of Industry 4.0 (Internet, biotechnology, nanotechnology, lighting technology, robotics ...) to agriculture in order to reduce labor, reduce losses due to natural disasters, pests, environmental safety, save costs in each stage or the whole production - processing - consumption process. Aquaponics system using solar energy is suitable for places with a lot of sunshine, soil is scarce and lack of water resources. This is exactly the case in Vietnam, where water resources are becoming increasingly scarce, only stored in lakes for the main purpose of hydropower. Using an aquaponics system can deal with the water problems that are taking place in many localities, especially in the midlands and mountainous areas. In this system, fish and vegetables will be grown in the same circulatory system. Fish eat food and generate waste, bacteria that will convert fish waste from the aquarium to a form of organic nutrients suitable for plants to grow. Water from the aquaculture system will be transferred into the hydroponic system. Therefore, the waste in the water will be converted by microorganisms into nutrients for plants to absorb again to grow. The water, after being cleaned by the plants in the hydroponic system, returns to the aquaculture system, ending a closed process. In comparison with the conventional aquaculture, the excretions and leftover food from animals can accumulate and increase the toxin in the water; The use of chemical fertilizers in farming affects the environment and people’s health negatively; Considering the benefits of the Aquaponics system: namely fresh fish and clean vegetables, safe water, antibiotic-free fish, safe for health, etc, are outweighed the traditional agriculture. In addition, helping investors save production costs, improve product quality, reduce environmental pollution towards modern green agricultural production.

Keywords: Agriculture 4.0, Aquaponics system, Solar power, Climate change, Vietnam.

| DOI: 10.17148/IARJSET.2021.8105