A cell control method, comprising: sending, by a radio network controller RNC, indication information for deactivating a secondary cell to a second NodeB in which the secondary cell resides, so that the second NodeB stops, according to the indication information for deactivating the secondary cell, sending data on a downlink channel of the secondary cell; sending, by the RNC to a first NodeB in which a primary cell resides, indication information for falling back a detection format, so that the first NodeB falls back, according to the indication information for falling back a detection format, to a single-cell uplink high-speed dedicated physical control channel HS-DPCCH channel coding format for detection, wherein the primary and secondary cell are provided in the context of High Speed Downlink Packages Access, HSDPA, multi-flow transmission for a same user equipment UE; and sending, by the second NodeB, indication information for stopping channel detection of the secondary cell to the user equipment UE, so that the UE stops, according to the indication information for stopping channel detection of the secondary cell, channel detection of the secondary cell, further comprising: notifying, by the RNC, the first NodeB of a time at which fallback of a detection format takes effect; and notifying, by the second NodeB, the UE of a time at which stopping channel detection of the secondary cell takes effect, wherein: the time, of which the first NodeB is notified by the RNC, at which fallback of a detection format takes effect is the same as the time, of which the UE is notified by the second NodeB, at which stopping channel detection of the secondary cell takes effect. sending, by a radio network controller RNC, indication information for deactivating a secondary cell to a second NodeB in which the secondary cell resides, so that the second NodeB stops, according to the indication information for deactivating the secondary cell, sending data on a downlink channel of the secondary cell; sending, by the RNC to a first NodeB in which a primary cell resides, indication information for falling back a detection format, so that the first NodeB falls back, according to the indication information for falling back a detection format, to a single-cell uplink high-speed dedicated physical control channel HS-DPCCH channel coding format for detection, wherein the primary and secondary cell are provided in the context of High Speed Downlink Packages Access, HSDPA, multi-flow transmission for a same user equipment UE; and sending, by the second NodeB, indication information for stopping channel detection of the secondary cell to the user equipment UE, so that the UE stops, according to the indication information for stopping channel detection of the secondary cell, channel detection of the secondary cell, further comprising: notifying, by the RNC, the first NodeB of a time at which fallback of a detection format takes effect; and notifying, by the second NodeB, the UE of a time at which stopping channel detection of the secondary cell takes effect, wherein: the time, of which the first NodeB is notified by the RNC, at which fallback of a detection format takes effect is the same as the time, of which the UE is notified by the second NodeB, at which stopping channel detection of the secondary cell takes effect. notifying, by the RNC, the first NodeB of a time at which fallback of a detection format takes effect; and notifying, by the second NodeB, the UE of a time at which stopping channel detection of the secondary cell takes effect, wherein: the time, of which the first NodeB is notified by the RNC, at which fallback of a detection format takes effect is the same as the time, of which the UE is notified by the second NodeB, at which stopping channel detection of the secondary cell takes effect. the time, of which the first NodeB is notified by the RNC, at which fallback of a detection format takes effect is the same as the time, of which the UE is notified by the second NodeB, at which stopping channel detection of the secondary cell takes effect.