Several instruments on the newgeneration greenhouse gases observing satellites are discussed and reviewed, especially GOSAT (Greenhouse Gases Observing Satellite) and OCO (Orbiting Carbon Observatory), which were launched by NASA and JAXA, in order to follow the advances in the field of greenhouse gases observation in the world Taking GOSAT and OCO as examples, the configuration setting of the sensors onboarded is analyzed By contrasting and analyzing the sensors onboarded in new generation satellites and traditional ones, some suggestions are given on the condition of lacking greenhouse gases observing data