Based on the knowledge background of ancient Chinese technology， including odd-even numbers to

yin

-

yang

， diurnal （day-night） cycle and annual （four seasons） cycle， changes of solar light manifestation and land surface temperature， a method of deduction and verification for

Hetu

（《河图》） and

Luoshu

（《洛书》） was proposed in this paper. To ensure the scientific rigor of research， the equivalent numbers to

yin

-

yang

were defined， and the diurnal as well as annual cycle models under coordinate system were constructed. On this basis， the

Hetu

and the

Luoshu

were derived by means of the variation regulations of solar irradiance and surface atmospheric temperature within one day and one year， which provided a solid foundation for the correct comprehension and application of

Hetu

and

Luoshu

. In addition， it was proved that

Hetu

and

Luoshu

could be derived from each other by using the equivalent numbers to

yin

-

yang

， which means the feature of unity. Multiple equivalent numerical forms for

Hetu

and

Luoshu

were presented.