The invention discloses a personal digital broadcast receiver and a method for transmitting network announcement information, and introduces a technical method which comprises the following steps thatThe invention discloses a personal digital broadcast receiver and a method for transmitting network announcement information, and introduces a technical method which comprises the following steps that: an office work network server transmits a broadcast registration authorization code through a short message service of a public network mobile communication system, and sends the announcement inform: an office work network server transmits a broadcast registration authorization code through a short message service of a public network mobile communication system, and sends the announcement information through a digital transmission channel of a frequency-modulated broadcast transmitter; and the personal digital broadcast receiver receives the announcement information through the digital transation through a digital transmission channel of a frequency-modulated broadcast transmitter; and the personal digital broadcast receiver receives the announcement information through the digital transmission channel of a frequency-modulated broadcast receiver, and receives the broadcast registration authorization code through the short message service of the public network mobile communication sysmission channel of a frequency-modulated broadcast receiver, and receives the broadcast registration authorization code through the short message service of the public network mobile communication system, wherein the broadcast registration authorization code is used for deciphering office work network information transmission for the announcement information. The method is suitable for occasions otem, wherein the broadcast registration authorization code is used for deciphering office work network information transmission for the announcement information. The method is suitable for occasions of office work network information announcement and notification in enterprises and institutions as well as universities and colleges, and has the characteristics of good mobility, storable inquiry, gof office work network information announcement and notification in enterprises and institutions as well as universities and colleges, and has the characteristics of good mobility, storable inquiry, good encryption, multi-user grouping and individual transmission, and low cost.od encryption, multi-user grouping and individual transmission, and low cost.