Disclosed is an error notification method of a data distribution system that includes the steps of when detecting an occurrence of an error, referring to an error notification condition table in which an identifier of an error notification condition and an identifier of an occurrence frequency correspond to each other to specify the identifier of the occurrence frequency corresponding to the identifier of the error notification condition of the error; referring to an occurrence frequency table in which the identifier of the occurrence frequency and information on a frequency number and an occurrence interval correspond to each other to acquire the information on the occurrence number and the occurrence interval corresponding to the identifier of the occurrence frequency; and determining whether an error notification is sent based on the information on the occurrence number and the occurrence interval.