Disclosed are thiazole methylamino pyridine compounds represented by the general formula (I) having fungicidal, insecticidal/acaricidal, and herbicidal activity, the preparation method thereof, the fungicidal, insecticidal/acaricidal, and herbicidal compositions containing the compounds of the present invention, and the use and the method for controlling fungi, insects/acari and weeds of the compounds of the present invention.