A method and an apparatus for obtaining and transmitting system information are provided by the present disclosure. The method of obtaining the system information includes: a function of detecting a first target beam is turned on under a preset trigger condition, where the first target beam is a beam that carries target system information and is emitted by a base station to shared initiating equipment in response to a system information request transmitted by the shared initiating equipment; the first target beam is detect before a preset state; and the target system information is obtained according to the first target beam when the first target beam is received before the preset state. With the method of obtaining the system information, acquisition latency of the target system information is effectively shortened and utilization of air interface resources is improved.