The EcoLAB of Green Eyes has been running continuously for 4 weeks on a buoy observation platform of the state oceanic administration, with good anti-biological corrosion effect and very valuable in-situ nutrient data. Compared with the traditional laboratory automatic nutrient analyzer, EcoLAB not only adopts the traditional spectrophotometry, but also guarantees the accuracy of measurement. Moreover, it measures the in-situ nutrient data, rather than the collected, transported and stored (possibly deteriorated) water sample data, which further guarantees the authenticity and objectivity of its data.