An environmental sensor and an environmental parameter measurement and prediction method, the environmental sensor comprising: a sensing element configured to sense an instant sensing characteristic value, so as to apply sending; an integrated circuit used for continuously obtaining the instant sensing characteristic value and an instant clock signal and obtaining via calculation an instant environmental parameter, so as to apply storing and outputting. A physical and chemical properties function corresponding to the sensing element is provided for the integrated circuit. Under a prediction model, the integrated circuit utilizes the physical and chemical properties function to conduct prediction calculation to obtain an actual environmental parameter, so as to apply storing and sending according to a current instant environmental parameter and an instant clock signal and at least one set of pre-stored instant environmental parameter and instant clock signal.