The invention provides a method for monitoring the plant grow adjusting and controlling, which mainly tests the plant green tissue chloroplast light-induction delayed fluorescence intensity on adjusting and controlling condition and compares it with the plant light-induction delayed fluorescence intensity to obtain the plant grow adjusting and controlling effect and degree and the adjusting and controlling effect of the adjusting and controlling factors. The apparatus comprises a split sample darkroom, a temperature control component, a visible light excitation component, a weak light probingcomponent, an A/D converter, a data processing component and a computer.