A data transmission and control device in a multi-node sensor network, comprising a processing control module (110). The processing control module (110) comprises an instruction processing unit, a data processing unit, at least one group of first-type interfaces (J101-J10n), at least one group of second-type interfaces (J201-J20n), one group of fifth-type interfaces (J500) and one group of sixth-type interfaces (J600). The fifth-type interfaces (J500) have communication connections with an external control device (120). The first-type interfaces (J101-J10n) respectively have communication connections with a sensor (140) so as to cooperate with the instruction processing unit to configure and query a parameter of the sensor (140), and to upgrade firmware and report feedback information of the sensor (140) and the processing control module. The second-type interfaces (J201-J20n) respectively have communication connections with the sensor (140) and the sixth-type interfaces (J600) have communication connections with an external service terminal (130) so as to cooperate with the data processing unit to acquire data of a plurality of sensors (140) and transmit the data to the external service terminal (130) for processing. The device controls the sensor (140) via a network, enables the data of the sensor (140) to be modular, and provides a uniform interface to the outside, thus forming a smart control platform for dynamic configuration, data processing and external interaction of the sensor (140).