4. An on-site speaker device, comprising: a receiving interface configured for receiving a text signal, wherein the text signal is automatically generated by an on-site text-generating device separated from the on-site speaker device in response to a parameter in an industrial environment sensed by an on-site sensor of the on-site text-generating device reaching a predetermined value; an on-site speech converting module configured for converting the text signal to a speech signal; and an on-site speaker configured for playing the speech signal and configured to broadcast an alarm in the industrial environment, wherein the text signal is automatically generated by selecting the text signal from a plurality of text signals preset by an on-site user to correspond to the parameter sensed by the on-site sensor reaching the predetermined value, wherein the on-site text generating device further includes a human machine interface for automatically selecting a text from a plurality of texts without input of the on-site user, and a transmitting interface for transmitting the text signal, wherein the human machine interface comprises a processor for determining an event indicating a certain device in the industrial environment is abnormal based on the parameter sensed by the on-site sensor, and wherein the text of the plurality of texts corresponds to the event.
4. An on-site speaker device, comprising: a receiving interface configured for receiving a text signal, wherein the text signal is automatically generated by an on-site text-generating device separated from the on-site speaker device in response to a parameter in an industrial environment sensed by an on-site sensor of the on-site text-generating device reaching a predetermined value; an on-site speech converting module configured for converting the text signal to a speech signal; and an on-site speaker configured for playing the speech signal and configured to broadcast an alarm in the industrial environment, wherein the text signal is automatically generated by selecting the text signal from a plurality of text signals preset by an on-site user to correspond to the parameter sensed by the on-site sensor reaching the predetermined value, wherein the on-site text generating device further includes a human machine interface for automatically selecting a text from a plurality of texts without input of the on-site user, and a transmitting interface for transmitting the text signal, wherein the human machine interface comprises a processor for determining an event indicating a certain device in the industrial environment is abnormal based on the parameter sensed by the on-site sensor, and wherein the text of the plurality of texts corresponds to the event. 6. The on-site speaker device according to claim 4 , wherein the text signal comprises at least two languages.