In order to make the sensor instrument measure the distribution field of the non-uniform environment, improve the measuring accuracy of the sample distribution point to the environment distribution field, an advanced environment gradient placement method based on traditional ones shall be proposed. Gradient coefficient as control standard, proposed gradient environmental distribution data with different levels of massive field distribution after Kriging spatial interpolation shall be obtained. As an example of indoor CO2 ,a comparative analysis on the gradient field distribution on a real stimulation with traditional ones shall be conducted. The results indicate the same number of distribution points, the gradient point distribution with high accuracy can tell the environmental distribution better compared with traditional ones .